Nurses’ First World War memoirs offer significant insights into the suffering endured by the war’s wounded and document the power of professional nursing in alleviating such suffering. They reveal both the tensions inherent in the relationship between professional and volunteer nurses and the ways in which these were often overcome to permit a close and supportive partnership. The social and professional backgrounds of nurses and volunteers had a significant impact on the ways in which they wrote about their wartime nursing experiences. Professionals were more likely to write about their patients than themselves; while volunteers offered sometimes harsh critiques of professional discipline while, at the same time, revealing their fascination with the power of nursing practice. Nurses wrote about their travels and adventures as well as about their nursing work, and some of their texts can be seen to have a ‘heretical’ quality: a few offer powerful exposes of the horror and futility of war.