The original cartography was based on maps from c.1713. It remained unchanged through it's various printings and states (as late as 1784) giving it a somewhat dated look as compared to other maps published of the area during the same time period.
Although Walter has a notation on the map of c.1745, research definitely marks this as the 4th State with the extension of the fishing banks to Cape Race and the added stippling of the fishing banks. This state was published unchanged in the English Pilot. 4th Book from 1753-1775.