Letter from Howard Walter Florey to R Pulvertaft Says there is a great deal of luck in his work - nothing would have emerged without the work of a large number of people - hopes Pulvertaft enjoys work at the Hebrew University - hopes he got some interest out of penicillin from Poole - plenty of penicillin now - have to teach people to use it to best advantage - Americans find it effective against spirochaetal jaundic and psittacosis. 5 July 1944