Letter from [John] Stanley Gardiner, Zoological Laboratory, Cambridge, to the Assistant Secretary of the Royal Society, Burlington House 'Dear Sir, I don't know whether you have already been requested to re-hang Mr.Borradaile's Certificate for a LEcture next year, if not, may I ask you, on behalf of Sir A. E. Shipley and myself to do so. Yours faithfully, J Stanley Gardiner'. 8 November 1921