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Revision 1.243 by root, Sat May 30 21:02:05 2015 UTC vs.
Revision 1.260 by root, Fri Dec 23 21:46:46 2022 UTC

84far greater than those listed. For example: `@@RXVT_NAME@@ --loginShell --color1 84far greater than those listed. For example: `@@RXVT_NAME@@ --loginShell --color1
85Orange'. 85Orange'.
86 86
87The following options are available: 87The following options are available:
88 88
89=over 4 89=over
90 90
91=item B<-help>, B<--help> 91=item B<-help>, B<--help>
92 92
93Print out a message describing available options. 93Print out a message describing available options.
94 94
127Turn on/off jump scrolling (allow multiple lines per refresh); resource B<jumpScroll>. 127Turn on/off jump scrolling (allow multiple lines per refresh); resource B<jumpScroll>.
128 128
129=item B<-ss>|B<+ss> 129=item B<-ss>|B<+ss>
130 130
131Turn on/off skip scrolling (allow multiple screens per refresh); resource B<skipScroll>. 131Turn on/off skip scrolling (allow multiple screens per refresh); resource B<skipScroll>.
132
133=item B<-fps> I<number>
134
135Compile I<frills>: Set the refresh interval (in frames per second or
136negative seconds); resource B<refreshRate>.
132 137
133=item B<-fade> I<number> 138=item B<-fade> I<number>
134 139
135Fade the text by the given percentage when focus is lost. Small values 140Fade the text by the given percentage when focus is lost. Small values
136fade a little only, 100 completely replaces all colours by the fade 141fade a little only, 100 completely replaces all colours by the fade
406Change the meaning of triple-click selection with the left mouse 411Change the meaning of triple-click selection with the left mouse
407button. Only effective when the original (non-perl) selection code is 412button. Only effective when the original (non-perl) selection code is
408in-use. Instead of selecting a full line it will extend the selection to 413in-use. Instead of selecting a full line it will extend the selection to
409the end of the logical line only. resource B<tripleclickwords>. 414the end of the logical line only. resource B<tripleclickwords>.
410 415
416=item B<-dpb>|B<+dpb>
417
418Compile frills: Disable (or enable) emitting bracketed paste mode
419sequences (default enabled). Bracketed paste mode allows programs
420to detect when something is pasted. Since more and more programs
421abuse this, these sequences can be disabled. The command sequences to
422enable and query paste mode will still work, but the actual bracket
423sequences will no longer be emitted. You can also toggle this from the
424ctrl-middle-mouse-button menu; resource B<disablePasteBrackets>.
425
411=item B<-insecure> 426=item B<-insecure>
412 427
413Enable "insecure" mode, which currently enables most of the escape 428Enable "insecure" mode, which currently enables most of the escape
414sequences that echo strings. See the resource B<insecure> for more 429sequences that echo strings. See the resource B<insecure> for more
415info. 430info.
427 442
428=item B<-ssr>|B<+ssr> 443=item B<-ssr>|B<+ssr>
429 444
430Turn on/off secondary screen scroll (default enabled); resource 445Turn on/off secondary screen scroll (default enabled); resource
431B<secondaryScroll>. 446B<secondaryScroll>.
447
448=item B<-rm> I<mode>
449
450Compile I<frills>: Sets long line rewrapping behaviour on window resizes
451to one of B<auto> (the default), B<always> or B<never>. The latter two
452modes do the obvious, B<auto> rewraps (acts like B<always>) if scrollback
453is non-empty, and wings lines (acts like B<never>) otherwise; resource
454B<rewrapMode>.
432 455
433=item B<-hold>|B<+hold> 456=item B<-hold>|B<+hold>
434 457
435Turn on/off hold window after exit support. If enabled, @@RXVT_NAME@@ 458Turn on/off hold window after exit support. If enabled, @@RXVT_NAME@@
436will not immediately destroy its window when the program executed within 459will not immediately destroy its window when the program executed within
514 close $pty; 537 close $pty;
515 538
516 # now communicate with rxvt 539 # now communicate with rxvt
517 my $slave = $pty->slave; 540 my $slave = $pty->slave;
518 while (<$slave>) { print $slave "got <$_>\n" } 541 while (<$slave>) { print $slave "got <$_>\n" }
542
543Note that, despite what the name might imply, the file descriptor does not
544need to be a pty, it can be a bi-directional pipe as well (e.g. a unix
545domain or tcp socket). While tty operations cannot be done in this case,
546B<@@RXVT_NAME@@> can still be remote controlled with it:
547
548 use Socket;
549 use Fcntl;
550
551 socketpair my $URXVT, my $slave, Socket::AF_UNIX, Socket::SOCK_STREAM, Socket::PF_UNSPEC;
552 fcntl $slave, Fcntl::F_SETFD, 0;
553 system "exec @@RXVT_NAME@@ -pty-fd " . (fileno $slave) . " &";
554 close $slave;
555
556 syswrite $URXVT, "Type a secret password: ";
557 my $secret = do { local $/ = "\r"; <$URXVT> };
558 print "Not so secret anymore: $secret\n";
519 559
520=item B<-pe> I<string> 560=item B<-pe> I<string>
521 561
522Comma-separated list of perl extension scripts to use (or not to use) in 562Comma-separated list of perl extension scripts to use (or not to use) in
523this terminal instance. See resource B<perl-ext> for details. 563this terminal instance. See resource B<perl-ext> for details.
551be used. Command-line arguments can be used to override resource 591be used. Command-line arguments can be used to override resource
552settings. The following resources are supported (you might want to 592settings. The following resources are supported (you might want to
553check the @@RXVT_NAME@@perl(3) manpage for additional settings by perl 593check the @@RXVT_NAME@@perl(3) manpage for additional settings by perl
554extensions not documented here): 594extensions not documented here):
555 595
556=over 4 596=over
557 597
558=item B<depth:> I<bitdepth> 598=item B<depth:> I<bitdepth>
559 599
560Compile I<xft>: Attempt to find a visual with the given bit depth; 600Compile I<xft>: Attempt to find a visual with the given bit depth;
561option B<-depth>. 601option B<-depth>.
662 702
663B<False>: specify that everything is to be displayed, even 703B<False>: specify that everything is to be displayed, even
664if the refresh is too fast for the human eye to read anything (or the 704if the refresh is too fast for the human eye to read anything (or the
665monitor to display anything); option B<+ss>. 705monitor to display anything); option B<+ss>.
666 706
707=item B<refreshRate:> I<number>
708
709Compile I<frills>: When positive, sets the maximum refreshes per second
710(the default is C<60>). When zero or negative, sets the minimum interval
711between refreshes, negated. That is, positive numbers limit the number
712of refreshes per second to that number, similar to a fps limiter in
713games. Zero or negative numbers get negated and directly set the minimum
714interval between refreshs, that is, C<10> and C<-0.1> both specify the
715same refresh interval (likewise C<50> and C<0.02>). Fractional values are
716supported; option B<-fps>.
717
667=item B<fading:> I<number> 718=item B<fading:> I<number>
668 719
669Fade the text by the given percentage when focus is lost; option B<-fade>. 720Fade the text by the given percentage when focus is lost; option B<-fade>.
670 721
671=item B<fadeColor:> I<colour> 722=item B<fadeColor:> I<colour>
871are not passed onto the shell; option B<-sk>. B<False>: do not scroll to 922are not passed onto the shell; option B<-sk>. B<False>: do not scroll to
872bottom when a non-special key is pressed; option B<+sk>. 923bottom when a non-special key is pressed; option B<+sk>.
873 924
874=item B<saveLines:> I<number> 925=item B<saveLines:> I<number>
875 926
876Save I<number> lines in the scrollback buffer [default 64]. This 927Save I<number> lines in the scrollback buffer [default 1000]; option B<-sl>.
877resource is limited on most machines to 65535; option B<-sl>.
878 928
879=item B<internalBorder:> I<number> 929=item B<internalBorder:> I<number>
880 930
881Internal border of I<number> pixels. This resource is limited to 100; 931Internal border of I<number> pixels. This resource is limited to 100;
882option B<-b>. 932option B<-b>.
944Mouse pointer foreground colour. 994Mouse pointer foreground colour.
945 995
946=item B<pointerColor2:> I<colour> 996=item B<pointerColor2:> I<colour>
947 997
948Mouse pointer background colour. 998Mouse pointer background colour.
999
1000=item B<pointerShape:> I<string>
1001
1002Compile I<frills>: Specifies the name of the mouse pointer shape
1003[default B<xterm>]. See the macros in the B<X11/cursorfont.h> include
1004file for possible values (omit the C<XC_> prefix).
949 1005
950=item B<pointerBlankDelay:> I<number> 1006=item B<pointerBlankDelay:> I<number>
951 1007
952Specifies number of seconds before blanking the pointer [default 2]. Use a 1008Specifies number of seconds before blanking the pointer [default 2]. Use a
953large number (e.g. C<987654321>) to effectively disable the timeout. 1009large number (e.g. C<987654321>) to effectively disable the timeout.
1008 1064
1009Change the meaning of triple-click selection with the left mouse 1065Change the meaning of triple-click selection with the left mouse
1010button. Instead of selecting a full line it will extend the selection to 1066button. Instead of selecting a full line it will extend the selection to
1011the end of the logical line only; option B<-tcw>. 1067the end of the logical line only; option B<-tcw>.
1012 1068
1069=item B<disablePasteBrackets:> I<boolean>
1070
1071Prevent emission of paste bracket sequences; option B<-dpb>.
1072
1013=item B<insecure:> I<boolean> 1073=item B<insecure:> I<boolean>
1014 1074
1015Enables "insecure" mode. Rxvt-unicode offers some escape sequences that 1075Enable "insecure" mode. Rxvt-unicode offers some escape sequences that
1016echo arbitrary strings like the icon name or the locale. This could be 1076echo arbitrary strings like the icon name or the locale. This could be
1017abused if somebody gets 8-bit-clean access to your display, whether 1077abused if somebody gets 8-bit-clean access to your display, whether
1018through a mail client displaying mail bodies unfiltered or through 1078through a mail client displaying mail bodies unfiltered or through
1019write(1) or any other means. Therefore, these sequences are disabled by 1079write(1) or any other means. Therefore, these sequences are disabled by
1020default. (Note that many other terminals, including xterm, have these 1080default. (Note that many other terminals, including xterm, have these
1038 1098
1039=item B<secondaryScreen:> I<boolean> 1099=item B<secondaryScreen:> I<boolean>
1040 1100
1041Turn on/off secondary screen (default enabled). 1101Turn on/off secondary screen (default enabled).
1042 1102
1103=item B<rewrapMode:> I<mode>
1104
1105Sets long line rewrap behaviour on window resize to one of B<auto>
1106(default), B<always> or B<never>.
1107
1043=item B<secondaryScroll:> I<boolean> 1108=item B<secondaryScroll:> I<boolean>
1044 1109
1045Turn on/off secondary screen scroll (default enabled). If this 1110Turn on/off secondary screen scroll (default enabled). If this
1046option is enabled, scrolls on the secondary screen will change the 1111option is enabled, scrolls on the secondary screen will change the
1047scrollback buffer and, when secondaryScreen is off, switching 1112scrollback buffer and, when secondaryScreen is off, switching
1074 1139
1075The key combination that triggers the action, I<sym>, has the following format: 1140The key combination that triggers the action, I<sym>, has the following format:
1076 1141
1077 (modifiers-)key 1142 (modifiers-)key
1078 1143
1079Where I<modifiers> can be any combination of B<ISOLevel3>, B<AppKeypad>, 1144Where I<modifiers> can be any combination of the following full or
1080B<Control>, B<NumLock>, B<Shift>, B<Meta>, B<Lock>, B<Mod1>, B<Mod2>, 1145abbreviated modifier names:
1081B<Mod3>, B<Mod4>, B<Mod5>, and the abbreviated B<I>, B<K>, B<C>, B<N>, 1146
1082B<S>, B<M>, B<A>, B<L>, B<1>, B<2>, B<3>, B<4>, B<5>. 1147=begin table
1148
1149 B<ISOLevel3> B<I>
1150 B<AppKeypad> B<K>
1151 B<Control> B<C>
1152 B<NumLock> B<N>
1153 B<Shift> B<S>
1154 B<Meta> B<M> I<or> B<A>
1155 B<Lock> B<L>
1156 B<Mod1> B<1>
1157 B<Mod2> B<2>
1158 B<Mod3> B<3>
1159 B<Mod4> B<4>
1160 B<Mod5> B<5>
1161
1162=end table
1083 1163
1084The B<NumLock>, B<Meta> and B<ISOLevel3> modifiers are usually aliased to 1164The B<NumLock>, B<Meta> and B<ISOLevel3> modifiers are usually aliased to
1085whatever modifier the NumLock key, Meta/Alt keys or ISO Level3 Shift/AltGr 1165whatever modifier the NumLock key, Meta/Alt keys or ISO Level3 Shift/AltGr
1086keys are being mapped. B<AppKeypad> is a synthetic modifier mapped to the 1166keys are being mapped. B<AppKeypad> is a synthetic modifier mapped to the
1087current application keymap mode state. 1167current application keymap mode state.
1110prefixed with C<string:>). 1190prefixed with C<string:>).
1111 1191
1112The following action prefixes are known - extensions can provide 1192The following action prefixes are known - extensions can provide
1113additional prefixes: 1193additional prefixes:
1114 1194
1115=over 4 1195=over
1116 1196
1117=item string:STRING 1197=item string:STRING
1118 1198
1119If the I<action> starts with C<string:> (or otherwise contains no colons), 1199If the I<action> starts with C<string:> (or otherwise contains no colons),
1120then the remaining C<STRING> will be passed to the program running in the 1200then the remaining C<STRING> will be passed to the program running in the
1240=item B<perl-ext>: I<string> 1320=item B<perl-ext>: I<string>
1241 1321
1242Comma-separated list(s) of perl extension scripts (default: C<default>) to 1322Comma-separated list(s) of perl extension scripts (default: C<default>) to
1243use in this terminal instance; option B<-pe>. 1323use in this terminal instance; option B<-pe>.
1244 1324
1245Extension names can be prefixed with a C<-> sign to prohibit using 1325Extension names can be prefixed with a C<-> sign to remove them again, in
1246them. This can be useful to selectively disable some extensions loaded 1326case they had been specified earlier. This can be useful to selectively
1247by default, or specified via the C<perl-ext-common> resource. For 1327disable some extensions loaded by default, or specified via the
1248example, C<default,-selection> will use all the default extensions except 1328C<perl-ext-common> resource. For example, C<default,-selection> will use
1249C<selection>. 1329all the default extensions except C<selection>.
1330
1331To prohibit autoloading of extensions, you can prefix them with C</>,
1332which will make urxvt refuse to automatically load them (this can be
1333overridden, however, by specifying the extension name again without a
1334prefix, though). This does not prohibit extensions themselves loading
1335other extensions. For example, C<default,/background> will keep the
1336C<background> extension from being loaded when a background OSC sequence
1337is received.
1250 1338
1251The default set includes the C<selection>, C<option-popup>, 1339The default set includes the C<selection>, C<option-popup>,
1252C<selection-popup>, C<readline> and C<searchable-scrollback> 1340C<selection-popup>, C<readline>, C<searchable-scrollback> and
1253extensions, and extensions which are mentioned in B<keysym> resources. 1341C<confirm-paste> extensions, as well as any extensions which are mentioned
1342in B<keysym> resources.
1254 1343
1255Any extension such that a corresponding resource is given on the 1344Any extension such that a corresponding resource is given on the
1256command line is automatically appended to B<perl-ext>. 1345command line is automatically appended to B<perl-ext>.
1257 1346
1258Each extension is looked up in the library directories, loaded if 1347Each extension is looked up in the library directories, loaded if
1315Turn on/off ISO 14755 (default enabled). 1404Turn on/off ISO 14755 (default enabled).
1316 1405
1317=item B<iso14755_52:> I<boolean> 1406=item B<iso14755_52:> I<boolean>
1318 1407
1319Turn on/off ISO 14755 5.2 mode (default enabled). 1408Turn on/off ISO 14755 5.2 mode (default enabled).
1320
1321=back
1322
1323=head1 BACKGROUND IMAGE OPTIONS AND RESOURCES
1324
1325=over 4
1326
1327=item B<-pixmap> I<file[;oplist]>
1328
1329=item B<backgroundPixmap:> I<file[;oplist]>
1330
1331Compile I<pixbuf>: Use the specified image file as the window's
1332background and also optionally specify a colon separated list of
1333operations to modify it. Note that you may need to quote the C<;>
1334character when using the command line option, as C<;> is usually a
1335metacharacter in shells. Supported operations are:
1336
1337=over 4
1338
1339=item B<WxH+X+Y>
1340
1341sets scale and position. B<"W" / "H"> specify the horizontal/vertical
1342scale (percent), and B<"X" / "Y"> locate the image centre (percent). A
1343scale of 0 disables scaling.
1344
1345=item B<op=tile>
1346
1347enables tiling
1348
1349=item B<op=keep-aspect>
1350
1351maintain the image aspect ratio when scaling
1352
1353=item B<op=root-align>
1354
1355use the position of the terminal window relative to the root window as
1356the image offset, simulating a root window background
1357
1358=back
1359
1360The default scale and position setting is C<100x100+50+50>.
1361Alternatively, a predefined set of templates can be used to achieve
1362the most common setups:
1363
1364=over 4
1365
1366=item B<style=tiled>
1367
1368the image is tiled with no scaling. Equivalent to 0x0+0+0:op=tile
1369
1370=item B<style=aspect-stretched>
1371
1372the image is scaled to fill the whole window maintaining the aspect
1373ratio and centered. Equivalent to 100x100+50+50:op=keep-aspect
1374
1375=item B<style=stretched>
1376
1377the image is scaled to fill the whole window. Equivalent to 100x100
1378
1379=item B<style=centered>
1380
1381the image is centered with no scaling. Equivalent to 0x0+50+50
1382
1383=item B<style=root-tiled>
1384
1385the image is tiled with no scaling and using 'root' positioning.
1386Equivalent to 0x0:op=tile:op=root-align
1387
1388=back
1389
1390If multiple templates are specified the last one wins. Note that a
1391template overrides all the scale, position and operations settings.
1392
1393If used in conjunction with pseudo-transparency, the specified pixmap
1394will be blended over the transparent background using alpha-blending.
1395
1396=item B<-tr>|B<+tr>
1397
1398=item B<transparent:> I<boolean>
1399
1400Turn on/off pseudo-transparency by using the root pixmap as background.
1401
1402B<-ip> (B<inheritPixmap>) is still accepted as an obsolete alias but
1403will be removed in future versions.
1404
1405=item B<-tint> I<colour>
1406
1407=item B<tintColor:> I<colour>
1408
1409Tint the transparent background with the given colour. Note that a
1410black tint yields a completely black image while a white tint yields
1411the image unchanged.
1412
1413=item B<-sh> I<number>
1414
1415=item B<shading:> I<number>
1416
1417Darken (0 .. 99) or lighten (101 .. 200) the transparent background.
1418A value of 100 means no shading.
1419
1420=item B<-blr> I<HxV>
1421
1422=item B<blurRadius:> I<HxV>
1423
1424Apply gaussian blur with the specified radius to the transparent
1425background. If a single number is specified, the vertical and
1426horizontal radii are considered to be the same. Setting one of the
1427radii to 1 and the other to a large number creates interesting effects
1428on some backgrounds. The maximum radius value is 128. An horizontal or
1429vertical radius of 0 disables blurring.
1430
1431=item B<path:> I<path>
1432
1433Specify the colon-delimited search path for finding background image files.
1434 1409
1435=back 1410=back
1436 1411
1437=head1 THE SCROLLBAR 1412=head1 THE SCROLLBAR
1438 1413
1462=head1 THE SELECTION: SELECTING AND PASTING TEXT 1437=head1 THE SELECTION: SELECTING AND PASTING TEXT
1463 1438
1464The behaviour of text selection and insertion/pasting mechanism is similar 1439The behaviour of text selection and insertion/pasting mechanism is similar
1465to I<xterm>(1). 1440to I<xterm>(1).
1466 1441
1467=over 4 1442=over
1468 1443
1469=item B<Selecting>: 1444=item B<Selecting>:
1470 1445
1471Left click at the beginning of the region, drag to the end of the region 1446Left click at the beginning of the region, drag to the end of the region
1472and release; Right click to extend the marked region; Left double-click 1447and release; Right click to extend the marked region; Left double-click
1519and character codes using the keyboard. It consists of 4 parts. The 1494and character codes using the keyboard. It consists of 4 parts. The
1520first part is available if rxvt-unicode has been compiled with 1495first part is available if rxvt-unicode has been compiled with
1521C<--enable-frills>, the rest is available when rxvt-unicode was compiled 1496C<--enable-frills>, the rest is available when rxvt-unicode was compiled
1522with C<--enable-iso14755>. 1497with C<--enable-iso14755>.
1523 1498
1524=over 4 1499=over
1525 1500
1526=item * 5.1: Basic method 1501=item * 5.1: Basic method
1527 1502
1528This allows you to enter unicode characters using their hexcode. 1503This allows you to enter unicode characters using their hexcode.
1529 1504
1590In addition to the default foreground and background colours, 1565In addition to the default foreground and background colours,
1591B<@@RXVT_NAME@@> can display up to 88/256 colours: 8 ANSI colours plus 1566B<@@RXVT_NAME@@> can display up to 88/256 colours: 8 ANSI colours plus
1592high-intensity (potentially bold/blink) versions of the same, and 72 (or 1567high-intensity (potentially bold/blink) versions of the same, and 72 (or
1593240 in 256 colour mode) colours arranged in an 4x4x4 (or 6x6x6) colour RGB 1568240 in 256 colour mode) colours arranged in an 4x4x4 (or 6x6x6) colour RGB
1594cube plus a 8 (24) colour greyscale ramp. 1569cube plus a 8 (24) colour greyscale ramp.
1570
1571B<@@RXVT_NAME@@> supports direct 24-bit fg/bg RGB colour escapes
1572C< ESC [ 38 ; 2 ; R ; G ; Bm > / C< ESC [ 48 ; 2; R ; G ; Bm >. However the
1573number of 24-bit colours that can be used is limited: an internal 7x7x5 (256
1574colour mode) or 6x6x4 (88 colour mode) colour cube is used to index into the
157524-bit colour space. When indexing collisions happen, the nearest old colour in
1576the cube will be adapted to the new 24-bit RGB colour. That means one cannot
1577use many similar 24-bit colours. It's typically not a problem in common
1578scenarios.
1595 1579
1596Here is a list of the ANSI colours with their names. 1580Here is a list of the ANSI colours with their names.
1597 1581
1598=begin table 1582=begin table
1599 1583
1700 1684
1701=head1 ENVIRONMENT 1685=head1 ENVIRONMENT
1702 1686
1703B<@@RXVT_NAME@@> sets and/or uses the following environment variables: 1687B<@@RXVT_NAME@@> sets and/or uses the following environment variables:
1704 1688
1705=over 4 1689=over
1706 1690
1707=item B<TERM> 1691=item B<TERM>
1708 1692
1709Normally set to C<rxvt-unicode>, unless overwritten at configure time, via 1693Normally set to C<rxvt-unicode>, unless overwritten at configure time, via
1710resources or on the command line. 1694resources or on the command line.
1781 1765
1782=back 1766=back
1783 1767
1784=head1 FILES 1768=head1 FILES
1785 1769
1786=over 4 1770=over
1787 1771
1788=item B</usr/lib/X11/rgb.txt> 1772=item B</usr/lib/X11/rgb.txt>
1789 1773
1790Colour names. 1774Colour names.
1791 1775
1796@@RXVT_NAME@@(7), @@RXVT_NAME@@c(1), @@RXVT_NAME@@d(1), @@RXVT_NAME@@-extensions(1), 1780@@RXVT_NAME@@(7), @@RXVT_NAME@@c(1), @@RXVT_NAME@@d(1), @@RXVT_NAME@@-extensions(1),
1797@@RXVT_NAME@@perl(3), xterm(1), sh(1), resize(1), X(1), pty(4), tty(4), utmp(5) 1781@@RXVT_NAME@@perl(3), xterm(1), sh(1), resize(1), X(1), pty(4), tty(4), utmp(5)
1798 1782
1799=head1 CURRENT PROJECT COORDINATOR 1783=head1 CURRENT PROJECT COORDINATOR
1800 1784
1801=over 4 1785=over
1802 1786
1803=item Project Coordinator 1787=item Project Coordinator
1804 1788
1805Marc A. Lehmann <rxvt-unicode@schmorp.de>. 1789Marc A. Lehmann <rxvt-unicode@schmorp.de>.
1806 1790
1808 1792
1809=back 1793=back
1810 1794
1811=head1 AUTHORS 1795=head1 AUTHORS
1812 1796
1813=over 4 1797=over
1814 1798
1815=item John Bovey 1799=item John Bovey
1816 1800
1817University of Kent, 1992, wrote the original Xvt. 1801University of Kent, 1992, wrote the original Xvt.
1818 1802

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