2020-06-21 15:13:44 UTC
C-inventor Dennis Ritchie (1941-09-09 - 2011-10-12) was a frequent poster here in the alt.folklore.computers newsgroup prior to his passing away at the age of seventy.
https://news.ycombinator.com/item?id=23582070 -- Hacker News -- is a discussion of the recent finding by DMR's sister of an unbound copy of DMR's doctoral dissertation in the possession of the widow of DMR's former advisor.
https://computerhistory.org/blog/discovering-dennis-ritchies-lost-dissertation -- is a 2020-06-19 article by David C. Brock explaining that our fellow a.f.c poster DMR could not receive his Ph.D. from Harvard University if DMR did not pay a hefty fee to have his dissertation bound and submitted to the Harvard library. So DMR never received his dissertation.