TS copy of letter from I.J. Good to AMT, beginning 'Dear Prof' and signed 'Jack'. IJG asks about the number of neurons in the brain; he understands that by next Oct. he and AMT will have swapped towns, 'Presumably you won't have much lecturing to do in M/C'. 131 Cheviot Gdns, NW2. 25 July 1948. 1 sh.
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