For example, in my first week on the job I learned that the most comprehensive work on the history of medicine in Oregon was published over 70 years ago! Olof Larsell’s The Doctor in Oregon: A Medical History (Portland: Binsford & Mort, 1947) documents the unique development of the practice of medicine in Oregon from the late 18th century to the mid-1940s. While there are inevitable errors in the 600+ painstakingly detailed pages, I’ve already found it an indispensable source for reference and research.
Needless to say, a lot has changed in medicine since 1947 - as has our perspective on the early history that Larsell wrote about. Who will write the next definitive work on this subject?