1. Whistle Bookmark Museum number: 1-49947 Culture or time period: Phase 1, Late Horizon: Hotchkiss facies (1100–1300 AD) Object class: Whistles Dimensions: length 98 millimeters Collector: Robert Fleming Heizer Collection place: CA-CCo-138, Oakley, Contra Costa County Collection date: June 14, 1938
2. Whistle Bookmark Museum number: L-15867 Culture or time period: Late Horizon: General facies Object class: Whistles Collector: Ernest N. Johnson and Jeremiah B. Lillard Collection place: CA-CCo-138, Oakley, Contra Costa County Collection date: 1936-1940