The Boy Volunteers with the British Artillery

Two American youths who served earlier with aviation recover in a hospital and then join a British artillery unit, experiencing frontline life and heavy-gun warfare. The narrative follows their training and observation duties, descriptions of artillery pieces and trajectories, reconnaissance of shelled battlefields and trenches, a lively camp behind the lines, encounters with spies and legal measures against espionage, and a hazardous expedition that uncovers an enemy range-finder and battery, culminating in a fierce counterattack. Illustrative technical explanations and line drawings accompany accounts of gun deployment, signaling from aircraft, and the tactics of observation and artillery fire.