[ McGregor / Historical and Descriptive Sketches of the Maritime Colonies of British America ]
McGregor (1797 - 1857) was a Scottish businessman, politician, civil servant, and writer.
This book, first published in London (Longman, Rees, Orme, Brown, and Green) in 1828, is an account of the northeast provinces of Canada, based largely on McGregor's travels there and on his desire to encourage British emigrees to settle in the British colonies of Canada rather than the United States. This book mentions Newfoundland dogs once, on p. 209:
The Newfoundland dog is a celebrated and useful animal, well known. These dogs are remarkably docile and obedient to their masters; they are very serviceable in all the fishing plantations, and are yolked in pairs and used to haul the winter fuel home. They are gentle, faithful, and good-natured, and ever a friend to man; at whose command they will leap into the water from the highest precipice, and in the coldest weather. They are remarkably voracious, but can endure, (like the aborigines of the country,) hunger for a great length of time, and they are usually fed upon the worst of salted fish. The true breed has become scarce and difficult to be met with, except on the coast of Labrador.