1. Pebble Bookmark Pebble, museum number 1-62632. Search result 1 Museum number: 1-62632 Object class: Pebbles Dimensions: length 66 millimeters, length 37 millimeters, and width 66 millimeters Collector: Walter D. Weymouth Collection place: CA-Sha-20, Shasta County, California Collection date: August 11, 1942