Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to C. F. Pond Esq., University Press, Cambridge States that the corresponding blocks of two of the figures requested by the Cambridge University Press, 6. and 8, on plates 18 and 19 of Proceedings A.106, are not with Harrison and Sons. Tells them to contact Messrs Waterlow and Sons [engravers]. 10 February 1928