Large sea chart insets of principal Welsh and Irish ports, large insets of Liverpool, Dublin, and Waterford, inset chart of the Firth of Clyde, dedications to the Lord Commissioners for Trade and Plantations, John Crosbie Major of Liverpool, and John Earl of Bute, within chart.
'A General Chart of the Saint George's Channel, containing a Particular Description Of the bearings of each Point of Land by the Common Compass as well as the true Meridain Line, and their distances from each other: With the Depth of the Water, Harbours &c. Corrected from actual Surveys, experienced Pilots, &ca. And Published by Capt[ai]n Rob[er]t Williamson of Liverpool 1766. '