[ London Times ]
This newspaper, most correctly known simply as The Times, began publication in 1785 and continues to this day.
The edition of September 11, 1840, contained a "Newf for sale" ad that remarks particularly on the "all black" coat.
NEWFOUNDLAND DOG for SALE. — A handsome specimen of this noble animal to be sold for six guineas. Color all black, size moderate, very [?], capital water dog, and so sagacious that he may be trained to anything a dog can be expected [?] to perform. Aged 16 months. Apply, between 1 and 3, at [?] Tottenham-court-road.