This is a rare nautical chart of the Pacific ocean by the English map publisher R. W. Seale.  
<ul><li>Chart depicts the trade routes used by <b><a href="//commons.wikimedia.org/wiki/Category:Manila_galleon" title="Category:Manila galleon">Spanish Galleons</a></b> from Acapulco, Mexico to Manila in the Philippines.</li>
<li>In particular, this chart depicts the travels of the Spanish Nostra Seigniora de Cabadonga and the British Navy Commodore George Anson.  Anson captured Nostra’s Spanish galleon in 1743.  The Spanish galleon was loaded with gold, silver and, more importantly, nautical charts depicting the trade routes used by Spanish Galleons between Mexico and Manila for the previous 200 years.  This significant discovery allowed the British to disrupts Spain’s trade in the Pacific and thus economically disrupt the Spanish dominance of the New World.</li>
<li>Beautifully details the pacific islands and much of the Mexican and California coast.</li></ul>
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<a rel="nofollow" class="external free" href="http://www.geographicus.com/mm5/cartographers/seale.txt">http://www.geographicus.com/mm5/cartographers/seale.txt</a></div>
1748 (undated)
This file was provided to Wikimedia Commons by <a rel="nofollow" class="external text" href="http://www.geographicus.com/">Geographicus Rare Antique Maps</a>, a specialist dealer in rare maps and other cartography of the 15th, 16th, 17th, 18th and 19th centuries, as part of a <a href="//commons.wikimedia.org/wiki/Commons:Geographicus" title="Commons:Geographicus">cooperation project</a>.