Typed letter signed ("Bertrand Russell") with an autograph correction.
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To his friend and colleague, the physical chemist Professor Mansel Morris Davies (1913-95) in Aberystwyth: "[...] I am sorry that it is not likely I shall be able to accept your invitation, because I am, at the moment, so overwhelmed with commitments in the work against nuclear war that I have taken on, and in projects such that I will [corrected to: shall] be obliged to reject many invitations I should wish to accept. I shall keep your invitation in mind, and should it be possible for me to accept it I shall inform you [...]" - An eminent historian and philosopher of science, Davies taught at Aberystwyth from 1947 to 1977. His obituary described him as "a passionate crusader for social and political justice, a lifelong militant pacifist, a Pugwash participant, a committed humanist with strong leanings towards Buddhism, a prolific author and letter writer, a discriminating collector, a riveting anecdotalist, a man of omnivorous literary, musical and scientific tastes". - Traces of folds and of scotch tape along edges of upper left corner. On Russell's stationery with printed Plas Penrhyn letterhead (watermarked "Papyrus Regia").