I'm doing a presentation later this year on the role Agnew Hunter Bahnson Jr. played in founding the Institute of Field Physics at the University of North Carolina at Chapel Hill. On a recent trip to the Philadelphia Museum of Art, I lucked onto a painting, ("The Agnew Clinic" by Thomas Eakins), of Bahnson's namesake, Dr. David Hayes Agnew. Dr. Agnew was the long time friend of Bahnson's grandfather and performed the excision of his elbow joint.
Thomas Eakins is a famous American painter who lived in the Philadelphia area. The "Agnew Clinic" was his largest painting. The picture below is of another painting by Thomas Eakins.