One clue is that "The Second Pass of the Portable C Compiler" is dated June 1979 and says on the title page, "John Lions, Bell Laboratories, Murray Hill, New Jersey", so he must have been there then. On 10/13/2022 06:08 AM, John P. Linderman wrote: > I can put a bound on John's early 80's sabbatical. John stayed at my > house in Berkeley Heights (an easy walk to Murray Hill) while he was > looking for a place to rent when Marianne joined him. I bought the > house in 1980, so it had to be later than that. And John put us up > when we visited Australia in 1983, so it was before that. I'm guessing > 1982, but that's just a guess. > > On Wed, Oct 12, 2022 at 5:05 PM steve jenkin > wrote: > > Berkeley Tague says he invited John to work with the USG in 1978 > [ AUUG, below. Also by Ronda Hauben in multiple places ] > > [ In two ‘recollections’ / history docs sourced from UNSW, ] > [ the first visit was misremembered as 1976 or 1977. ] > > I was wondering when John's two other sabbaticals to Bells Labs were. > > The Peter Ivanov interview with John in “Unix Review”, 1985, notes > two sabbaticals by then. > > After writing the celebrated Commentary on the UNIX > Operating System in 1976, > Lions was asked to spend two sabbaticals at the Labs. > > This comment in 2000 on “9fans” from Rob Pike > says John also visited in 1989, > but sadly his work by then had been affected. > > > > Anyone know when the other visit was? > > Presumably 1983 or 1984 if John took a semester off every 5 years. > > ======== > > In AUUGN Oct 1995, V16 #5, there’s a collection of emails, an > ‘interview’ with John > > PDF pages 17 & 24 > > > > Berkeley Tague says in 1978 he invited John to work with the USG. > > then > He wanted to come to Murray Hill for his sabbatical so it > was a win/win situation. > He spent two or three summers at Bell Labs over the years > and supplied us with many of his graduate students > for sabbaticals and permanent employment. > > Later: > > AUUGN: > What have been the professional highlights of your career? > > JL: > For myself, three sabbaticals at Bell Laboratories have > been highlights. > For my students, opportunities arose for employment at the > Laboratories. > > ======== > > -- > Steve Jenkin, IT Systems and Design > 0412 786 915 (+61 412 786 915) > PO Box 38, Kippax ACT 2615, AUSTRALIA > > mailto:sjenkin@canb.auug.org.au > http://members.tip.net.au/~sjenkin > >