[ The Dog Fancier ]
This American magazine (Battle Creek, MI) began publication in 1891.
The April, 1913,issue carried this brief note, in its "Fancyisms" section, on the near extinction of the Newfoundland:
We have had several inquiries for Newfoundland dogs lately. This breed is nearly extinct and it is almost impossible to get a genuine Newfoundland, although there are several dealers (note that we did not say breeders) advertising them. Don't fool yourself with the belief that you are getting a Newfoundland. (4)
The idea that the Newfoundland was a vanishing breed was touched on in a surprising number of magazine articles and books in the early years of the 20th Century. For discussion of the idea, see this article here at The Cultured Newf.