Ex libris van Louis Ring (1881 - 1936) by anonymous and Bernhard Wenig https://www.rawpixel.com/image/13775227/libris-van-louis-ring-1881-1936-anonymous-and-bernhard-wenigFree Image from public domain licenseJoseph F.F. Babinski, Henri Vaquez, L. Bernard and three others. Photograph. https://www.rawpixel.com/image/13986965/joseph-ff-babinski-henri-vaquez-bernard-and-three-others-photographFree Image from public domain license