This extensively annotated wartime diary illuminates the military service of Leslie Howard Miller (1889–1979), a Canadian soldier who served in the First World War. Miller joined the Canadian Expeditionary Force (CEF) in 1914. In his off-duty hours, he kept this extraordinarily eloquent diary of his training, deployment overseas, service on the Western Front, and periods of leave in the United Kingdom. Graham Broad, working from a transcription of the diary produced by Miller’s family, includes a thorough introduction and afterword, as well as over 500 notes that situate and explain Miller’s many references to the people, places, and events he encountered. Unpublished for over a century, written in bracing and engaging prose, and illustrated with Miller’s own drawings and unseen photographs, Part of Life Itself illuminates a bygone world and stands as one of Canada’s most important wartime diaries.