Letters from and relating to Peter Wishart; the first group - mainly from Wishart to Trowell ([late 1958?-11 Mar 1983) are numbered 1-67; further letters - mainly between Trowell and Wishart's wife Maureen (Nov 1984-Nov 2006) relate mainly to the composer. A separate group of letters (30 Jun 1970-30 Nov 1977) represent the processes of Peter Wishart becoming Professor of Music at King's College, London in 1972 and at the University of Reading in 1977.