The great probability of a North West Passage: deduced from observations on the letter of Admiral de Fonte, who sailed from the Callao of Lima on the discovery of a communication between the South Sea and the Atlantic Ocean; And to intercept some Navigators from Boston in New England, whom he met with, Then in Search of a North West Passage. Proving the authenticity of the Admiral's letter. With three explanatory maps . 1st. A Copy of an authentic Spanish Map of America, published in 1608. 2d. The Discoveries made in Hudson's Bay, by Capt. Smith, in 1746 and 1747. 3d. A General Map of the Discoveries of Admiral de Fonte. By Thomas Jefferys, Geographer to the King. With an appendix. Containing the account of a discovery of part of the coast and inland country of Labrador, made in 1753. The Whole intended for The Advancement of Trade and Commerce.

Date:

MDCCLXVIII. [1768]