Sketch J No. 6 San Francisco Bay California Showing Surveys of Sites for Light Houses and for Military and Naval purposes

Chart of San Francisco Bay Showng Surveys and Sites for Light Houses and Military and Naval purposes. This chart shows the Farallon islands and range into the Golden Gate and on to San Francisco Bay. Also shown are the Bay of San Pablo, Suisin Bay, City of San Francisco, Benicia, the site of Vallejo, New York of the Pacific, San Joachin River and many points and other locations noted. The map has two insets detailing and showing proposed light locations at Fort Point and Alcatraz Island. Notes on the survey are shown as well.

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low-quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.