Letter from John Clay, University Press, Cambridge, to [Robert William Frederick] Harrison, Burlington House 'Dear Sir, We are instructed by Professor Larmor to apply to you for the block of the Royal Society's Arms (as enclosed print) for use in an address we are printing to the American Philosophical Society. As we, have very little time to spare, we should be glad if you would kindlysend the block by return and oblige. Yours faithfully, John Clay'. 9 March 1906