The Museum’s Research Library, named after Petaluma City Historian Hoppy Hopkins (1921-2003), contains books and files that assist in history, genealogy, and architectural research of Petaluma and close environs. Collection strengths include such treasures as: early maps, the Vallejo land grant; books relating to topics as the Miwok Indians, poultry and dairy industries; histories of surrounding communities; blueprints of homes and buildings designed by local architect Brainerd Jones; city directories from as early as 1875; yearbooks from the 1890s; and a copy of the first newspaper published in Petaluma in August of 1855.