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.
Sir Edwin Landseer died 1 October 1873, and while it normally published obituaries within a month or two of a notable person's death, this journal's formal recogntion of Landseer's passing was published slightly later than normal — it appeared in the January 1874 issue — owing, I suspect, to the length of the tribute: 9 full pages.
And tribute it is: "Of all modern painters he is perhaps the best understood, and therefore it is that he stands unrivalled as the general favourite. . . . he is the Raphael of animal painters. But he has also the feeling of a poet." (59)
Yet not a single one of Landseer's Newfoundland paintings is even alluded to, let alone mentioned by name. Compare this act of unimaginable negligence to the obituary which appeared in The Times (London) three months earlier.
The Gentleman's Magazine obituary was written by one J. Callingham, may his name live in infamy. (I believe he was a painter, and may have specialized in marine scenes, though I can find almost no solid information on him.)