The collection largely consists of typescripts of the later novels written from 1966-1974, especially those featuring Mary Tudor. There are also notes for many of the earlier novels dating back to 1942. The few personal papers include letters of condolence on the death of her husband, Professor Michael Lewis.
Some additional material relating both to this collection and to Professor Lewis's papers (see GB 159 Lw M) has been accessioned and awaits cataloguing.