Ok, I was just thinking that we have a lack of Unix version 5 (and
older) source code but since the Unix v5 era was the era of
teletypewriters perhaps there could be a stockpile of old teletype
printouts somewhere. Assuming they didn't run out of paper all the
time there would have been an automatic record generated of everything
Thompson and Ritchie did. Some of those printouts must have been kept
somewhere.
Mark