Collection contains reprints of articles written by Irwin and articles written about him and his career, biographical data, and photographs.

Greenleaf was born in Pennsylvania and educated at the Medical College of Ohio, graduating in 1860. During the Civil War, he oversaw construction of Philadelphia's Mower Hospital on Chestnut Hill, which was at the time the largest military hospital in the world. He introduced a system of personal identification used by the army and organized the army's Hospital Corps.

Includes biographical data and typescript of diary. McPhail was assistant surgeon, U.S. Army. Diary records his journey leading to the signing of a treaty with the Comanches.

Dr. Marquis practiced medicine in Montana, was with the U. S. Medical Corps during World War I, and became government physician on the Tongue River-Cheyenne Indian reservation. Because of his interest in Indian subjects he eventually gave up his medical practice and devoted full time to gathering historical data and writing.