This document discusses various untapped sources for researching the history of anesthesia, including university dissertations from the 1850s on etherization and chloroform during labor. It provides biographical details on the authors of two early dissertations. Newspapers, patents, theses, magazines, and electronic books are also mentioned as sources. Specific newspaper articles from the late 19th century describing chloroform uses and deaths are highlighted. The document encourages searching newspaper archives, patents, dissertations, magazines, and other sources for additional anesthesia history information.