Letter from Howard Walter Florey to J S K Boyd, Wellcome Laboratories of Tropical Medicine, Euston Road, London Says Abraham and Love tell him it would be most helpful if Boyd would do steps 2-4 in preparation of secretin as offered, especially if Boyd could dry down the acetone moist mucosa - no difficulty in collecting pig material from local abbattoirs - should be pleased to see Dr Newman - he will be busy in middle of the day but Abraham and Love can provide any information. 3 October 1955