1. Mortar Bookmark Museum number: 1-24348 Culture or time period: Volvon Object class: Ground stone and Mortars (grinding tools) Function: 1.5 Household Dimensions: length 16.5 centimeters, height 8.1 centimeters, and width 14 centimeters Collector: S. C. Haight Collection place: Mount Diablo, Contra Costa County, California Collection date: 1923
2. Pestle Bookmark Museum number: 1-24349 Culture or time period: Volvon Object class: Ground stone and Pestles Collector: S. C. Haight Collection place: Contra Costa County, California Collection date: 1923