"The British Governments in Nth. America
Laid down Agreeable to the Proclamation of Octr. 7. 1763"
Below is a close-up of the nicely detailed map
Information: By Gibson. Bermuda inset.
Size: 20 x 24 cm. (8 x 9½ in.) [HxW]
References: Jolly, D.C. (Brit Per) GENT-170; Fite & Freeman #55.