Have you been to the National Museum of Civil War Medicine in Frederick, MD? They have what they claim is the only original CW ambulance left. I took some pictures of it a few years ago. They also have a Confederate stretcher, a special wagon that carried medicines, and all sorts of related material. Check out their website at http://www.civilwarmed.org/index.cfm.
Also checkout the book: The Ambulance; Katherine Traver Barkley, 1978, reprinted 1990
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