Hi, A scan of the printed UNIX Version 6 documents set is now online at the link below since last week. The set consists of documents accompanying the manual pages in the programmer's manual (similar to volume 2 in v7).
https://www.computerhistory.org/collections/catalog/102659317 The [nt]roff user manual, tmg compiler-compiler, and m6 macro processor memos were previously missing from the distributions in TUHS and later efforts to re-create the documentation. I have been working on finding this documentation as part of researching roff history. Still interested in earlier copies of the internal memoranda from Ossanna that served as the NROFF User's Manual since v3, the TROFF User's Manual after v5, and TROFF Made Trivial starting around v4. Based on the manpage histories, the documentation was revised for v4, 5, and 6. Best, Dan Plassche
