arnold(a)skeeve.com writes:
I think Emacs for Unix (not GNU Emacs) was also
available. I don't
remember too much more.
Someone tipped me off this is Montgomery's "BTL" Emacs:
http://unixpc.taronga.com/STORE/EMACS+IN.gz
It's a cpio archive, and the Name file says:
"UNIX PC EMACS Version 4.9c 9/5/85 - from THE STORE!"
No source code, unfortunately.