Copper engraved map showing the United States with pre-Mexican American War Boundaries and claims into present-day British Columbia.. 'Austin's Colony' is named in Texas. Alaska is named 'Russian Possessions' with the "Boundary Settled in 1825". In the west the 'R. Buenaventura' connects by a dotted line to a large lake named 'L. Salado' and empties into the Pacific at Monterey.