1856 USCS Entrance to San Francisco Bay 1st Edition

Large folding folio 23 x 42" Rare 1st edition in Fine condition, a great treat to have this one , with the finest and earliest detail of the areas around and within SF bay , like Tiburon, Bolinas, Drakes Bay and Alameda estuary . Building count, riparian and topographic data. Condition is much better than appears in the scan. so I've left the photos to show true tanning at creases and folds usually evident on this series of federal maps and charts. This is a very nice folio , clean and worthy of framing or archiving.