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A cipher left by Robert Thouless has been solved

A cryptanalyst Richard Bean has solved a cipher left by Robert Thouless (President of the SPR, 1942-1944). 

Richard Bean solves another Top 50 crypto mystery [EXTERNAL LINK]

Thouless published the cipher 1946 in the Proceedings of the SPR, Vol. 9, No. 48, pp. 253-263.