Letter from A Crichton, The Anglo-Ceylon & General Estates Company Limited, 20 Eastcheap, London, to the Secretary of the Royal Society, Burlington House, Piccadilly Informs they have large estates on Mauritius and the loss of draught anumals for four years from the 'Surra diesease'. Thought hey have other means of transport, the 'Surra' reappears when new livestock is bought. Requests the results of Drs Plummer and Thompson's who 'discovered a drug of the nature of a tartrate of sodium and antimony, which is effectual against trypanosomes'. 28 November 1907