found: His The life and habits of wild animals, 1874.
found: Dict. of British artists, 1880-1940(Wolf, Joseph, 1820-1899: animal and bird painter, lithographer, illustrator)
found: Allgemeines Lexikon der Bildenden Künstler(Wolf, Joseph: born Wolff, Matthias, Jan. 22, 1820 in Mörz, near Koblenz, Germany; d. Apr. 4, 1899 in London; apprenticed and studied in Koblenz (w/ bros. Becker), Darmstadt, Antwerp; worked in London from 1848, assoc. with Zoological Soc., expeditions of Gould, Livingstone, Darwin, Landseer, Whymper, Zwecker; helped found German Athenaeum in London)
found: Bénézit(Wolf or Wolff, Joseph or Matthias: worked with Dr. Kaup, naturalist, in Darmstadt; friend of Rossetti in London, worked at British Museum 1848; exhibited 1849-81 at Royal Acad., Royal Inst.)
found: Fisher, Clemency Thorne. "Wolf, Joseph (1820-1899)," in Oxford dictionary of national biography, 2004, accessed online November 16, 2017(Wolf, Joseph (formerly Mathias) (1820-1899), wildlife painter; born in Mörz, near Münstermaifeld, in Rhenish Prussia, on January 22, 1820; birth certificate gives name as Mathias, but he later changed it to Joseph; worked in Darmstadt as a lithographer with the publisher Ernst Kern, and in his free time worked for the ornithologist Eduard Rüppell, executing drawings for Rüppell's Systematische Uebersicht der Vögel Nord-Ost-Afrikas (1845); in 1848, Wolf went to London at the invitation of David William Mitchell, secretary of the Zoological Society of London, where he assisted Mitchell with a British Museum-based project, illustrating Robert Gray's Genera of birds (1844-1849); afterwards he assisted John Gould with illustrations for Birds of Great Britain (1862-1873); first exhibited at the Royal Academy, 1849; created illustrations for publications of the Zoological Society of London, for the ornithological journal Ibis, and for many other works; died at 2 Primrose Hill Studios, Fitzroy Road, Regent's Park, his residence since 1874, on April 20, 1899)
found: Jackson, Christine E. Dictionary of bird artists of the world, 1999:page 496 (Wolf, Josef Mathias, 1820-1899, born Mörz, Eifel, January 22, 1820, died London, April 20, 1899; his drawings were reproduced as lithographs and wood engravings for use as book illustrations; made some charcoal sketches and watercolors for several lithographs in John Gould's books. "His best work was not in illustrations, but in his magnificent oil and watercolour paintings of birds of prey and game birds")
found: Database of scientific illustrators, November 16, 2017(Wolf, Joseph; alternate names, J.W.; Matthias Wolf (until 1846); Josef Wolf), born 1820 in Mörz, near Münstermaifeld, died 1899 in London; lists employers, patronage, collaborators)
found: Wikidata, November 16, 2017(Joseph Wolf (Q1708274), German natural history illustrator; deutsch-englischer Tiermaler)
found: Union List of Artist Names Online, November 16, 2017(Wolf, Joseph (German painter, illustrator, and lithographer, 1820-1899, active in Britain; ID: 500006240)
