Very rare pre-Mitchell map of the British Colonies in Noth America, published pursuant to Act of Parliament in November 1750, for Owen's Magazine of Magazines.

The map shows the northeast from Newfoundland to Georgia and west to just beyond Lake Erie, Lake Huron and Hitanachi or St. Esperit River (an early name for the Apalachiola River).

Of perhaps greatest note is the lack of reference to any French Forts west of the Alleghany mountains in the Ohio Valley, as this had not yet become a major subject of contention.

The configuration of the Del-Mar-Va peninsula is very unusual. The boundary line for Pennsylvania does not include Delaware (given to Maryland) and extends only just past the Susquehanna with a mysterious lake to the west. Numerous Indian tribes are named and a couple more mystery lakes shown in the south.