One part of the collection consists of letters written by Harry Clark, Jr., to his mother, Jane (Jennie) Clark, in London, Ontario, after he had enlisted in the Canadian Army. The other letters were received by a distant relative, Kathleen Jackson (ne Hastings), while she was recovering from tuberculosis in London, Ontario. The letters, which describe conditions in wartime Britain, were written by relatives of Kathleen,s father Hugh Hastings, who died while convalescing from wounds sustained in the First World War.