This map contains elements from previous maps; most specifically, the cartouche is copied from De Vaugondy's 1755 map of Canada. The map is hand coloured with the colours showing the British and French possessions of the area covered. The atlas this map is from was published between 1776 and 1784. Sources consulted do not specify which printing this map is from although as the 1st state it was earlier, rather than later in this period.
This map was apparently copied from Morse's American Geography. However because there are no notes on the map and the north eastern boundary between the United States and British North America (specifically New Brunswick and Quebec) had been under negotiation at various times since 1783 we can't determine which edition of American Geography it was copied from. The topic of the north eastern boundary would have been of interest at this time as it was finally resolved in 1842.
There are several interesting notes on the founding of the various English settlements covered by the map. The accompanying magazine article points out that the purpose of the map is illustrate the "just" claims of Great Britain and the "encroachments" of the French.
In addition to being published on its own, this map appeared in a number of different publications. The Oxford Dictionary of National Biography describes Thomas Jefferys as "cartographer, and publisher; produced some of the most important eighteenth-century maps of the Americas; appointed Geographer to George III in December 1760".
Covers New York and areas of New England, Pennsylvania, Maryland, Virginia, North and South Carolina, Georgia and other states reaching to the Mississippi River. Identifies Indian Nations. A map of British American Plantations extending from Boston in New England to Georgia, including all the black settlements in the provinces as far as the Mississippi. Elaborate cartouche depicting a monkey, slaves and child, native people, arrow embedded in a head.