Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Stanley Smith] Cook Esq. Sends back his manuscript ['Erosion by Water Hammer'] and a copy of the letter sent to Sir Charles Parson [see NLB/71/187]. States Parsons agreed the paper should be amplified as suggested, but unsure whether he told [Stanley Smith] Cook before he left England. 4 February 1928