A collection of twenty papers by Professor Peter Rolfe Vaughan, published in conjunction with a memorial symposium at the Royal Geographical Society on March 18, 2008, and the striking of a new medal to be awarded annually to the most gifted post-graduate on the Imperial College Soil Mechanics MSc course, to which Peter contributed for over 30 years. Includes Vaughan's obituary, full listing of his bibliography, and personal reflections from some of his colleagues.