London, A. and C. Black, 1893-1896.

London, J. Van Voorst, 1871-85.

London: R.H. Porter, 1897.

London :R. H. Porter,1885-1897. | Harvard University, Museum of Comparative Zoology, Ernst Mayr Library Vi

London, sold by R. H. Porter, 1864-1907.

article by Alfred Newton in the 9th edition (1884) of Encyclopædia Britannica

London: [J. Akerman, photo-lithographer], 1880.

entry in Dictionary of National Biography