The Henry M. Thomas, Jr., Collection spans his entire career at Johns Hopkins. It contains family and professional correspondence, military service records, patient histories, manuscripts, scientific notes, association records, governance documents, speeches, and reprints. The collection documents Thomas' career on the faculty of Johns Hopkins University in the department of medicine, his military activities in the United States Army, and his varied activities in the local community. Two boxes of World War II correspondence as well as his chapter, "Medical Consultant History of Internal Medicine World War II " are of particular interest.