Twin directories of xdir:

[DIR]  ftp://ftp.pmel.noaa.gov/CNSD/nicklis/xdir/
[DIR]  ftp://ftp.zenez.com/pub/SCO/skunkware/uw7/net/xdir/
[DIR]  ftp://ftp.zenez.com/pub/SCO/skunkware/uw7/x11/apps/xdir/
[DIR]  ftp://ftp.zenez.com/pub/SCO/skunkware/osr5/net/xdir/
[DIR]  ftp://ftp.zenez.com/pub/SCO/skunkware/ou8/net/xdir/
[DIR]  ftp://ftp.zenez.com/pub/SCO/skunkware/ou8/x11/apps/xdir/
[DIR]  ftp://ftp.zenez.com/pub/SCO/Skunk96/UnixWare/FreeBird/internet/client/xdir/
[DIR]  ftp://ftp.informatik.uni-stuttgart.de/pub/archive/comp.sources/x/xdir/
[DIR]  ftp://ftp.funet.fi/pub/archive/comp.sources.x/volume4/xdir/
[DIR]  ftp://ftp.funet.fi/pub/archive/comp.sources.x/volume5/xdir/
[DIR]  ftp://ftp.funet.fi/pub/archive/comp.sources.x/volume6/xdir/
[DIR]  ftp://ftp.silug.org/pub/historical/InfoMagic-CD/usenet/199410/cd2/x/volume4/xdir/
[DIR]  ftp://ftp.silug.org/pub/historical/InfoMagic-CD/usenet/199410/cd2/x/volume5/xdir/
[DIR]  ftp://ftp.silug.org/pub/historical/InfoMagic-CD/usenet/199410/cd2/x/volume6/xdir/
[DIR]  ftp://ftp.uu.net/.vol/9/comp.sources.x/volume4/xdir/
[DIR]  ftp://ftp.uu.net/.vol/9/comp.sources.x/volume5/xdir/
[DIR]  ftp://ftp.uu.net/.vol/9/comp.sources.x/volume6/xdir/
[DIR]  ftp://nic.funet.fi/pub/archive/comp.sources.x/volume6/xdir/
[DIR]  ftp://nic.funet.fi/pub/archive/comp.sources.x/volume5/xdir/
[DIR]  ftp://nic.funet.fi/pub/archive/comp.sources.x/volume4/xdir/