William Hayes, 18 January 1913 - 7 January 1994

William Hayes, physician, microbiologist and geneticist, made his own special contribution to modem genetics and molecular biology in a manner unlike those of any of his contemporaries. Bill, as he was universally known, was an unlikely candidate for such distinction. It is interesting to speculate on the events which transformed someone likely to have had a distinguished but still traditional medical career into a world renowned scientist who influenced a whole generation of microbiologists and geneticists. He did not come from a family with a history of scientific or academic activities. Nor did he study at the centres of biological research. Moreover, at the beginning of his meteoric rise to eminence, he did not have the support of the scientific elite or access to research resources. It is likely that had he been born 20 years later the originality that he brought to microbial genetics would have been lost to us. Perhaps the situation he found in India during the war and the relative freedom of the research system operating in the United Kingdom in the 1950s ideally suited the talents of Bill Hayes. He was a dedicated experimentalist with a talent for improvisation, and his major contributions were experiments that he did himself, rather than through an assistant or graduate student. He would not have described himself as a leader, although his associates willingly gave him their loyalty and support. Nor would he have thought of himself as having charisma; indeed he was unusually self-effacing. When he gave up experimental work to write his outstanding and extraordinarily influential book, The genetics of bacteria and their viruses (13), he typed the first draft himself. Administration and the power it can provoke were anathema to Bill. Nevertheless, he created, first at Hammersmith Hospital in London and then at the University of Edinburgh, research groups that were the envy of his peers in terms of their productivity and innovation.