1. Powder Bookmark Powder, museum number 1-45411. Search result 1 Museum number: 1-45411 Collector: Omer C. Stewart Collection place: NV-Ch-35 (Humboldt Cave), Churchill County, Nevada Collection date: June 1936
2. Powder Bookmark Powder, museum number 1-45412. Search result 2 Museum number: 1-45412 Collector: Omer C. Stewart Collection place: NV-Ch-35 (Humboldt Cave), Churchill County, Nevada Collection date: June 1936