Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Colonel Sir Sidney Burrard, RE, KCSI, FRS Informs Colonel Sir Sidney Burrard that the volumes of the de Filippi Expedition on the stratigraphical geology are not yet issued, but suggests that the publisher might lend Burrard a proof of the geological map for Burrard's paper. 2 May 1930