Sketch J Showing the Progress of the Survey of the Western Coast 1849-51

Progress chart of the West Coast from Cape Todos Santos to the Columbia River showing important harbors, rivers, Channel Islands, and places. Progress notes 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.