During the First World War he produced anti-German propaganda in the form of humorous postcards. They reflected on the war from the opinion, as he saw it, of the men serving, and the realities facing their families at home. Cards dealing with the so-called "home front" covered issues such as rationing, home service, war profiteers, spy scares and interned aliens. Recruitment and "slackers" were other topics covered. Many cards were designed to appeal to the soldier who wished to send a card home to his sweetheart and these cards showed couples. Cards showed soldiers in training, and there were many light-hearted jokes about the Scottish soldier and his kilt. A few cards showed images of nursing sisters, and at least one showed three female munitions workers. There were relatively few cards depicting a soldier in action, and some depicted men in the Navy. Only a few of the military-themed cards were serious, such as one showing a British Red Cross medic caring for a wounded German soldier.