1. Sketch of the route of Capt. Warner's exploring party in the Sacramento Valley and Sierra Nevada Creator: Williamson, R. S. (Robert Stockton), 1824-1882 Published / Created: 1849 or 1850] Call Number: 844 1849A Container / Volume: BRBL_00601 Image Count: 1 Resource Type: Maps, Atlases & Globes Found in: Beinecke Rare Book and Manuscript Library > Sketch of the route of Capt. Warner's exploring party in the Sacramento Valley and Sierra Nevada [Calif.] : during the months of August, September, and October 1849 / by R.S. Williamson, Lieut. Top. Engrs., assistant to Capt. Warner.