Diary entries mention routine duties and events, as well as military activities Northrup participated in or witnessed, such as movement around France, caring for horses, retrieving supplies, fixing roads and building a bridge while under fire, seeing engineers and soldiers go “over the top”, air raids, air battles, artillery fire, gas attacks, gas sickness, casualties, and destruction. Routine observations often involve weather conditions, sending and receiving mail, getting pay, camp conditions, availability of food, presence of “cooties”, hiking distances, towns passed through or visited while in camp, availability of baths and clean clothing, meeting his friend WB, inspections, movies, getting deloused, playing ball, and some police and guard duty after the armistice. Personal medical issues mentioned include sunburn, seeing a doctor about his foot, back pain, an attack of “gas sick”, and a sore throat. Private Northrup went on leave in Grenoble in February 1919. 3½ x 5½ in., cloth-bound, with a strap for carrying, approximately 115 leaves. Diary entries occupy one side only of 57 leaves. There also are numerous blank leaves, 16 pages of names; addresses, and four pages of what appear to be place names, mostly in France.