This is a lovely example of the 1851 U.S. Coast Survey chart of Mare Island Straits, California. The map covers part of the San Francisco Bay area including Mare Island, Straits of Karquines and parts of Vallejo.
Vallejo, which served as the capital of California in 1852 and 1853, is here identified as such – ‘Seat of the Government of California’.
The chart includes numerous depth soundings along with coastal features and important maritime notes. It was compiled under the direction of A.D. Bache, Superintendent of the Survey of the Coast of the United States and one of the most influential American cartographers of the 19th century.