[TUHS] Thompson at Berkeley on an 11/70

I'm experimenting with adapting Unix history and lore using the new EXPECT/SEND feature in simh. My favorite guinea pig is the story of Ken Thompsons sabbatical at Berkeley where he brings up V6 on new 11/70 with Bob Kridle and Jeff Schriebman. Any details not yet recorded in obvious places[1] are of course more than welcome! One of the things I'm trying to get right is what they actually brought up there initially in 1975. This must have been standard V6 or the Bell UNIX Ken brought with him, but I can't figure it out. Salus has Schriebman, Haley and Joy installing the fixes on the 50 bugs tape late summer 1976. This suggests it was stock V6 initially, but they might have been playing on a different system or working from a fresh install in 1976. If it was stock V6 initially, what were they waiting for? Legal stuff? If it was 1975 Bell UNIX, can I reconstruct this using the 54 patches collected by Mike O'Brien[2], or is that going to be way off from what Thompson left in Urbana-Champaign with Greg Chesson in 1975? [1] http://www.tuhs.org/books.html minus the Bell journals for example [2] Hidden in /usr/sys/v6unix/unix_changes in one of the Spencer tapes http://www.tuhs.org/Archive/Applications/Spencer_Tapes/unsw3.tar.gz