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 fold lines, a few short splits at the fold junctions, and a small puncture hole adjacent to Klamath Marsh that has been closed on verso with archival tape.