The New and Correct Chart of the Western and Southern Oceans.

• Main Authors: Halley, Edmund, Mount and Davidson
• Format: Map
• Language: unknown
• Published: Mount and Davidson 1794
• Subjects: Nautical Charts; Oceans; Seas; Data Visualization; Anchorage; Davidson; Thornton; Newfoundland
• Online Access: https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~297689~90069302; https://media.davidrumsey.com/MediaManager/srvr?mediafile=/Size4/RUMSEY~8~1/171/12434002.jpg

Foldout. This is a corrected edition of Edmund Halley's landmark 1701 chart with the same title. Peter Barbour hailed that chart as the "most significant cartographic achievement of Williamite England" (The Age of William III & Mary II, plate 106.) It was one of the earliest thematic maps, and the first to show lines of equal magnetic variation which was an important advance for navigation. A version of Halley's chart was added to the Fourth Book in 1721, but was discontinued in favor of this revised version in 1749. As noted in the flanking text, there is a "perpetual though slow Change in the Variation almost everywhere, which as made it necessary to construct [the chart] anew from accurate Observations, made by the most ingenious Navigators." Rare final edition of the Fourth Book of the English Pilot, which was published in five separate books, and was the first major sea-atlas published in England. Furthermore, the Fourth Book was the first wholly English sea-atlas of American waters. The English Pilot, taken as a whole, had a long and complex publishing history that illustrates the development of the chart trade in England during its formative period. Introduced in 1689, by John Thornton and William Fisher, the Fourth Book was the most successful of the five, and had the longest continuous run of editions. Phillips, Atlases, 1171 (1784 edition); Verner, A Carto-bibliographical Study of The English Pilot The Fourth Book (Charlottsville, 1960) 37; Cf. Verner, [facsimile] The English Pilot The Fourth Book (London: 1689);