Reflection of an anatomy theater’s window in the chorion (outermost membrane) covering a fetus from William Hunter’s Anatomia uteri humani gravidi tabulis illustrata / auctore Gulielmo Hunter ... The anatomy of the human gravid uterus exhibited in figures. Birmingham: 1774. After drawings by Jan van Rymsdyk (Dutch, ca.1750—1789). Engraving. Charles Deering McCormick Library of Special Collections, Northwestern University, Evanston, Ill.