Letter from G C Robson, Honorary Secretary, The Challenger Society for the promotion of the study of Oceanography, British Museum (Natural History), Cromwell Road, South Kensington, to the Assistant Secretary of the Royal Society, Burlington House, Piccadilly 'Dear Sir, Will you kindly note that in future the above mentioned Society will not require the use of your rooms for their quaterly meetings as they have been compelled to seek accomodation elsewhere. Thanking you for your assistance in the past. Believe me, Yours faithfully, G C Robson'. 23 April 1921