Fifteen French doctors wearing aprons and holding various instruments. Colour lithograph by A. Barrère, ca. 1903. https://www.rawpixel.com/image/13959298/image-cartoon-people-bookFree Image from public domain licenseFourth International Congress of Zoology , Cambridge University; nine scientists, in academic dress. Photograph by F.J.… https://www.rawpixel.com/image/14020149/photo-image-person-clothing-manFree Image from public domain licenseDieulafoy with his assistants and students during a lecture at l'Hôtel-Dieu. Photograph, 1900. https://www.rawpixel.com/image/13981891/photo-image-person-hospital-public-domainFree Image from public domain license