Highly detailed pocket map of Sierra County, published by C.F. Weber.
The map shows early railroads, roads, wagon roads, mines, lakes, mills, and many other details.
Sierra County was one of the original counties of the state of California, created in 1850 at the time of admission to the Union. Parts of the county's territory were reassigned to Amador County in 1854 and to Alpine County in 1864.