Among those who have provided invaluable help in the making of this site are: Peter Adamson, Paul Allwright, Martyn Anglesea, Julian Brookes, Jennifer Broughton, Hugo Chapman, Andrew Cormack, Susan Faulkner, Stephen Ginn, Shun Kungsun, Michael Halls, Kaye Holgate, Brigitte Istim, Lucia Lindsay, Frances Rankine, Keith Sagar, Charlie Sheppard, Nicole Simpson, Tatyana Tsankova, Richard Tummers, Helen Walasek, Yvonne Webb, Geraldine White, Steve White, and the staff of Cambridge University Library.