The collection includes personal and professional correspondence. Some are family letters, most are professionally related. Included University of Virginia correspondents are John T. Ashley, Robert M. Carey, Rose M. Chioni, Kenneth Crispell, Don E. Detmer, Richard F. Edlich, Frank L. Hereford, R. Scott Jones, Norman J. Knorr, and Robert M. O'Neil. Correspondents outside of UVa include W. G. Anlyan, Willard E. Goodwin, Hiram C. Polk, Mark M. Ravitch, Jonathan E. Rhoads, Robert S. Sparkman, H. William Scott, and Richard L. Varco. Dr. Muller was a member of many organizations and some of those are represented here including the American College of Surgeons, American Surgical Association, Halsted Society, Medical Society of Virginia, Muller Surgical Society, Society of University Surgeons, Southern Society for Clinical Research, and Southern Surgical Association. There is also a 25 page recollection of his time with Dr. Alfred Blalock, a UVa Surgery Department scrapbook, photos, and slides of the construction of the 1989 hospital.