Twin directories of old-slack-docs:

[DIR]  ftp://ftp.uni-wuppertal.de/pub/linux/slackware/slackware-3.6/docs/old-slack-docs/
[DIR]  ftp://ftp.lug.udel.edu/pub/slackware/slackware-3.6/docs/old-slack-docs/
[DIR]  ftp://ftp.slackware-brasil.com.br/slackware-3.6/docs/old-slack-docs/
[DIR]  ftp://ftp.uni-siegen.de/pub/slackware/slackware-3.6/docs/old-slack-docs/
[DIR]  ftp://ftp.tu-chemnitz.de/.SAN0/pub/linux/slackware/slackware-3.6/docs/old-slack-docs/
[DIR]  ftp://ftp.otenet.gr/pub/linux/slackware/slackware-3.6/docs/old-slack-docs/
[DIR]  ftp://ftp.xcp.kiev.ua/pub/slackware/slackware-3.6/docs/old-slack-docs/