BR includes a testimonial for Casimir Lewy. See record 135014.

A group of 4 letters from BR (all to Casimir Lewy, one including a testimonial) and one a letter to him from Patricia Russell was to be auctioned on 21 June 2024, according to https://www.liveauctioneers.com/ and https://www.bonhams.com/auction/30293/lot/219/philosophers-bertrand-russell-and-ge-moore-collection-of-letters-to-eminent-cambridge-philosopher-casimir-lewy-1919-1991/, along with many letters from G.E. Moore.

Dr. Lewy (1919–1991) taught at Cambridge, Liverpool, and Cambridge again, where he was elected a fellow.

Two different images of the group of letters are included with this record.