From the surveys of Williamson and Abbot, this map covers the region from the Siskoyou Range and Klamath Lakes north to above the Columbia River. Finely engraved with topographical and watershed detail including fine hachure throughout the mountainous area. The Emigrant Road, unexplored regions, various routes of the surveying parties, the historical routes of Fremont and Warner, and the first settlements are identified. The Three Sisters, Mount Hood, Mt. Jefferson, Diamond Peak, John Mule Mountain and more are located .

References: Wheat (TMW) #882.

Condition: B

Issued folding with light toning along the folds and several fold separations along the left side of the image that have been repaired on verso with archival tape. Trimmed to just inside the neatline at top left.