This rare and important sea chart covers the western Patagonian coastline south of the city of Castro on Chiloe Island. It presents a simplified version of the treacherous coast, but several bays, capes, and river mouths are identified. The chart was elegantly engraved with fine calligraphy, a bold title cartouche, sailing ship, and compass rose by the Florentine craftsman Arnoldo Lucini.

Robert Dudley was the first Englishman to produce a sea atlas, Dell Arcano del Mare (Secrets of the Sea). Dudley, a skilled mathematician and navigator, was exiled from England and settled in Florence where his atlas was published. He introduced a totally new style for sea charts in the atlas with only lines of latitude and longitude and no rhumb lines. The charts were meticulously compiled from original sources and were both scientific and accurate for the time. This important atlas was the first sea atlas of the whole world; the first to use Mercator's projection throughout; the earliest to show the prevailing winds, currents and magnetic deviation; and the first to expound the advantages of Great Circle Sailing. In an introductory leaf found in one copy in the British Library, the engraver (Lucini) states that he worked on the plates in seclusion for twelve years in an obscure Tuscan village, using no less than 5,000 pounds of copper for the printing plates. It was only issued in two editions and the maps are rarely seen on the market. This map is from the first edition.

References: Shirley (BL Atlases) M.DUD-1a #137.

Condition: B+

A dark impression on watermarked paper with light foxing and printer's ink residue. A centerfold separation in the right blank margin has been closed on verso with archival materials.