This is one of the rarer of the large sea charts of New England to appear in Mount & Page’s ‘English Pilot Fourth Book’. The atlas was first issued in 1689 and was the bible for navigators in North American waters for a hundred years. This particular chart by Captain Henry Barnsley was first included in the 1764 edition. It replaced the Southack chart and centred more on the coast of New England and shows none of the present Canadian coastline. It did not appear for long being replaced itself by a John Senex chart in 1775. It did however make one further appearance alongside the Senex in the 1794 issue.

This chart illustrates the coast of New England from Cape Cod to Casco Bay and is orientated with north to the upper right to mirror the direction of the coastline which extends north eastwards. As one might expect from such a map it includes numerous depth sounds, shoals and other navigational hazards. Upper right may be found five profile views. The left hand sheet is taken up almost entirely by the Massachusetts Bay extending northwards to Newberry. Various churches and buildings mark the sites of several towns along the coast. Baynton-Williams ‘The Charting of New England’, Map Forum no. 93; McCorkle 760.1; Sellers & Van Ee 809; Verner Facsimile no. 55.