 The park covered 35,000 acres containing more than 2,000 historic buildings and sites such as Alcatraz, and a number of military forts and gun batteries, including a forgotten Civil War fortification at Fort Mason, the Black Point Battery.He co-directed the archaeological excavation of the battery with Martin T. Mayer.He also led the park's early efforts to survey, characterize, and restore elements of the Adolph Sutro Historic District, which included Sutro heights, the grounds of the estate of Adolph Joseph Heinrich Sutro, developer of much of San Francisco's "Outside Lands," and onetime Mayor, as well as Sutro's Cliff House, San Francisco and the ruins of the Sutro Baths.