The late Mary Gough was an accurate and dedicated observer of wildlife, and its habitats. In the last ten years she spent long periods in the Luangwa Valley in Zambia, and was part author, with R. M. Lawton, of a paper on elephant grazing and browsing in the Luangwa in Oryx, May 1970. She was killed in the field in 1971. These notes have been compiled from her detailed diaries by Ray Lawton and her sister, Evelyn Millward, as a memorial to her work. Miss Millward also paid for Mrs Gough's photographs to be reproduced in colour. The introduction and the discussion are by Dr Lawton and Miss Millward.