This collection consists of 372 photographs, drawings, glass lantern slides, and realia, including a silver "mess cup" and two other silver cups won by the ROTC Medical Unit at Washington University. The objects in the collection depict scenes from Base Hospital 21 in Rouen, France, as well as reunions the members of Base Hospital 21 had many years later. Many of the photographs were originally bound in two albums, and the photographs remain mounted on the unbound album pages that include typed captions. Drawings include sketches of the Base Hospital 21 buildings and grounds, cartoons depicting life as a personnel member of Base Hospital 21, and watercolor sketches of fluoroscopic equipment invented and operated by Dr. Edwin C. Ernst. The majority of the drawings are now housed on glass lantern slides.