This monumental, small scale, map and chart was produced by Des Barres off the back of hundreds of individual surveys made by the British before, during and after the French Indian war (1755-1763). It represents a landmark in the chronology of map and chart making, drawing as it does especially on hundreds of Cartographic and hydrographic surveys completed by Samuel Holland and his teams of surveyors for the General Survey of North America (1764-1775).
The first impressions of the chart Des Barres produced were much simpler and did not include as much detail . The note at the bottom of this 1780 edition states that 'the Shoals of Nantucket which in the proceeding Editions of this Chart were laid down from a Sketch sent me by Lieu' Knight of the Navy, extended too far to the southward, are corrected in this, and the Soundings he has lately taken are added' (see Heritage Charts A101, A113 and A115). The original inscription had the added line; 'and the track of HMS Eagle Sept 1778 in chace [sic] of the French fleet', which was removed for this imprint. The name 'Quebec' was added to the right of the Bar scales in 1780.
Lt. John Knight was a particular favorite of Des Barres whom he sponsored in the development of his career and is one of few who Des Barres ever credited for his survey work throughout the making of the Atlantic Neptune.
This particular chart was hand-colored to show the territorial boundaries under British control confining the Americans and the French after the French-Indian war (also known as the Seven Years War) which ended with the Treaty of Paris in February 1763.
The Treaty had given Britain control of Florida from Spain, and Quebec and the rest of North America, east of the Mississippi, from France. The hand written inscription on the bottom of the Bar scale denotes: 'where the subjects of France are allowed'; 'Where the American are' and where the French are permitted 'to cure and dry their fish' (on the small islands of Miquetor, Langley and St. Peter's, just south of Newfoundland). The style of this inclusion is a clear indication of British attitudes toward the French at the time.
A chart of the North Eastern part of North America, complied and produced by J.F.W. Des Barres. This is a final state or impression of a chart originally drawn in 1777. Through the addition of colour it shows the division of land, after the Treaty of Paris in 1763, between the British, French and the Americans after the end of the French Indian War.