Issued in 1648 in Sir Robert Dudley's Dell'Arcano del Mare (though apparently printed in 1647), this is the "first printed sea chart of the north-west coast of North America, depicting the coastline as far north as 50o. It uses Mercator’s projection for the first time and is the earliest to indicate the prevailing winds and ocean currents. Beautifully engraved by Antonio Francesco Lucini, it records magnetic deviations of the compass. Poto: di Nuoua Albion is located at 38½o with two legends that record the English visit to the coastline in 1579. It has been suggested that Dudley’s friendship with Sir Francis Drake gave him access to the latter’s papers relating to his landfall in California… A descriptive legend near C: Mendocino at 40o states that both Drake and some Spanish pilots found the cape to be at this latitude, but that others believe it to be closer to 50o… The strait separating America from Asia is named after Japan, IL STRETTO DE IEZO. Combining the two west coast charts, Dudley’s overall longitudinal length of the coast is quite accurate” – Burden. This is the first state of the map, without the addition of “Lo.6o” to the title that occurred in the 1661 issue. Burden declares that of the two states, “both are rare, the first being especially so.” Burden 284; Wagner 352d.