The studies of Sir Edwin Landseer, R.A.. : illustrated by sketches from the collection of Her Majesty The Queen and other sources : with a history of his art-life (1877)
Monkhouse, W. Cosmo (William Cosmo), 1840-1901, author, Landseer, Edwin Henry, Sir, 1802-1873. Works. Selections · London : Virtue and Company, Limited · leaf 34
the same kind with a similar excrescence, but there was no doubt in that case what the excrescence was — viz. another and smaller pair of hind legs, with tail complete, which depended in a ludicrous and pitiable manner from somewhere near the middle of the unhappy creature’s back. Mr. Dafforne *… … hideous outgrowth is in this case also superfluous hindquarters, the hoofs of which have grown into the semblance of horns, and that its position is accounted for by stoppage of its growth. The next group that we give, though undoubtedly drawn from nature in England, reminds us much more of the…
Landseer, Edwin Henry, Sir, 1802-1873 · Animals in art
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.