In article by Dennis Ritchie:
The chist paper on my home page is pretty complete (if
telegraphic)
about bootstrapping B on the PDP-7 and later C (via B) on the -11.
The chist paper doesn't mention NB, which was the missing link between
B and C. I seem to recall a story where there was an NB interpreter
and also a compiler, and Ken kept adding functionality to one which
made it slower, and this had a knock-on effect. Sorry, that's all I
can dredge out of my wetware bit store. Was this in `A Quarter Century
of UNIX' by Peter Salus? Are there any other paper/web references to NB?
Warren