Mount Pleasant Hospitals, Washington, D.C. (1862). Original from the Library of Congress. https://www.rawpixel.com/image/7691019/image-art-public-domain-medicalFree Image from public domain licenseSoldier's Rest, Alexandria, Va. (1864). Original from the Library of Congress. https://www.rawpixel.com/image/7690997/image-art-public-domain-soldierFree Image from public domain license