The diary reveals a woman who took it for granted that she should do everything possible to aid the war effort and details her care of the sick and wounded at No. 3 Canadian General Hospital (McGill), forty miles behind the trenches, as well as at No. 2 Canadian Casualty Clearing Station, where she was within range of the shells. Combined with Susan Mann's sensitive and thoughtful introduction, the Gass diary provides a fresh look at Canadian participation in the First World War. It will appeal to a wide range of readers with an interest in military history, women's history, medical history, gender and war, diaries, and the history of nursing.