Correspondence between Professor William Prusoff and Sir John Vane The correspondence file actually beings with a letter from Dr Yung-Chi Cheng, inviting Vane to a celebration in honour of Prusoff, there is a reply from Vane with his regrets. This is followed in 1999 with a letter from Professor Prusoff suggesting an introduction between a relative of his studying in the UK and SIr John Vane, again with a reply from Vane included, passing on his telephone number to Prusoff. 6 August 1998 - 4 January 2000