For his graduate research comparing languages around the world, Lewis Lawyer couldn’t find a single published reference book on Patwin, an endangered language once spoken in hundreds of Northern California communities, including what is now Davis. So, on his way to completing his UC Davis doctorate, Lawyer wrote one. With the release of "A Grammar of Patwin," the findings of his dissertation are now available to scholars as well as to Patwin/Wintun people working to revitalize their ancestral language.