[ Gentleman's Magazine ]
The Gentleman's Magazine was an important and influential monthly magazine in the 18th and 19th Centuries; it began in 1731, ceased regular publication in 1907, and shut down completely in 1922.
The April 1882 issue carried an anti-vivisection article entitled "The Future of Vivisection," which mentions Newfoundlands in a hypothetical context:
They are as yet afraid that the great public of the nations should come to realise what their work really is, what their torture-chambers really are, and they use as yet artistic false- hoods to cover up that which they do and hide it from the eyes of the multitude. But in a little while, if unchecked now, they will cast off these disguises; these trained torturers will get tired of merely tying down the Newfoundland dog in the trough, and fetching the Nile crocodile to the Paris laboratory; they will cast aside periphrasis, and openly declare, what they now do say amongst themselves, that without human subjects no true results can be ascertained.