Jennifer De Witt writes: "We are trying to locate collections of print advertising from the mid-19th to the mid-20th centuries." (more stuff deleted) You might try the Archives Center at the National Museum of American History (Smithsonian Institution). They have several collections relating to advertising and an ongoing program to document the history of advertising. I don't have an e-mail address, but their snail-mail address is: National Museum of American History Archives Center MRC 601 Washington, DC 20560 Paul Silbermann National Air and Space Museum [log in to unmask] Archives Division ****************** My own opinions, not NASM's ****************