Chiefly ms texts, as follows:
Dielectrics discussion group, Cambridge March 1972;
Edinburgh March 1972, 'The Seven Phases of Sodium Niobate' (given at a seminar on 'Ferroelectrics & Their Applications' and published in Ferroelectrics 1974 Vol 7) including first draft, paper as given, and offprint of published article;
Cambridge October 1972, 'Crystal architecture and lattice dynamics' / 'Structures and lattice dynamics in perovskites';
Australia February 1973, including programme for the 9th Meeting of Australian Crystallographers at La Trobe University, at which Helen Megaw chaired a session on Oxides.