At the time when these observations were made both the Gnus, according to Sir Andrew Smith, inhabited, in enormous multitudes, the grassy plains to the northward of the Vaal River, and after the fall of the summer rains were in the habit of advancing simultaneously in large herds as far as the southern branches of the Orange River. But on reaching the latter stream singularly enough the Brindled Gnu ceased to advance, and the Common Gnu alone passed into the Cape Colony. The appearance of the latter to the south of the Orange River was the signal for hunters of all denominations to prepare for the chase, and though the yearly slaughter was very great the herds in those days never ceased to renew their periodical visitations. Strongly expressed as are the views of both Andrew Smith and Harris as to the line of demarcation between the two species of Gnu, there seems to be some doubt as to their correctness. An excellent recent authority, Mr. H. A. Bryden (‘Kloof and Karroo’), tells us that the Brindled Gnu was in former days certainly a “denizen, albeit a rare one, south of the Orange River,” and gives us Gordon-Cumming as an authority. Gordon-Cumming asserts (‘Hunter’s Life in South Africa,’ p. 148) that he met with the Brindled Gnu in the Karroo country west of Colesberg, in what is now the Hopetown division of the Cape Colony. But Mr. Bryden admits that it has now for many years been extinct in that district. In the Transvaal, also, he tells us, the Boers have, of late years, played sad havoc with this singular Antelope, not long ago found in countless thousands on the plains of that Republic. Messrs. Nicolls and Eglington, in their ‘Sportsman in South Africa,’ tell us the same story. Writing in 1892, they state that, except in some of the northern districts along the Crocodile River, the Brindled Gnu is now extremely scarce in the Transvaal, and practically extinct in the Orange Free State. But it is still met with in Bechuanaland, and is fairly plentiful along the edges of the Great Kalahari Desert. “In the Lake Ngami district, on both banks of the Botletle River, and from thence right up to the Chobe and Zambesi, it is quite common in suitable localities, and, at the present time, large troops may be seen on the Ma-Chara-Chara and Mababe Flats, and in the country surrounding the great salt-pans of Makari-Kari, through which the main road passes to the Victoria Falls.”