Letter from H F Atter to David Christie Martin, West Riding of Yorkshire Rivers Board, 71, Northgate, Wakefield 'Dear Sir, I am much obliged by your letter of yesterday's date, returning forms signed by Sir Robert Robinson, and note that in future he desires that such forms, before being submitted to him, should be signed by a Professor of Physiology. Yours faithfully, H F Atter'. 8 March 1947