Details"Survey of SAN DIEGO RIVER and its vicinity with a view to the Construction of a LEVEE and CANAL to turn the river from its present course by order of Col. J.J. Albert, Chief of U.S T. Engrs. by George H. Derby Lt. T. Engrs. Assisted by C.H. Poole C.E. 1853. Copy reduced from the Original."
Inset with a zoomed out view of peninsula extending to form the False and San Diego Bays, and with a note on the river's seasonal activity.