Important early map of Washington Territory, being the first GLO map issued after the establishment of Idaho Territory and truncation of Washington in the east to its final shape. Wheat noted that this map was significant in its location of the Gold Mines on the Simalkameen River, gold Bard Diggins on the Columbia north of Ft. Colville and Gold Bar on Clark's Fork above it junction with the Columbia. The surveying work is primarily west o f the Cascadesand on along the southern and eastern extent of Puget Sound. A number of early roads are shown, including Steven's Route for the P.R.R. There are early suveys near Walla-Walla south of the Snake River. Steptoe's Battle ground is shown near Mullan's Road. The St. Ignatius Mission is shown on Clark's Fort and the Pres. Mission north of the Spokane River. The boundary of the Nez Perce Reservation is located, as is Ft. Okinakane. The Old Catholic Mission is shown north of Atahnam River. A road from Ft. Dalles to the Agency and forck on the Simcoe River is shown. Over a dozen coastal bays and settlements are named. Lighthouses at New Dungeness and Blunts Island are shown in the Staits of Juan de Fuca. This example has been de-acidified, flattened and laid on Japan paper, making it strong and easy to handle and in nice condition. Wheat 1089.