The next author after Pallas to mention this Antelope appears to have been Allamand, who made various contributions to an edition of Buffon’s ‘Histoire Naturelle,’ issued in Holland by Schneider in 1766 and the following years. Allamand, however, carelessly confounded this South-African Antelope with the _Gazella gutturosa_ of Siberia, of which the native name is Tzeiran or Dzéren (see Book of Ant. III. p. 84), and adopted the same name for it. Allamand’s figure of his “Tzeiran” was taken from a mounted specimen in the Cabinet d’Histoire Naturelle of J. C. Sylvius von Lennep, of Harlem, which on the death of the owner had passed by bequest to the Société Hollandaise des Sciences of that city. This specimen, when in skin, had been obtained from a dealer who did not know whence it came, but from the mode of its preparation it was believed by Allamand to have been brought from the Cape. Our countryman Pennant, in his ‘History of Quadrupeds,’ of which the first edition was published in 1781, gave a third original description of this species, which he called the “Blue Antelope.” It was taken, he tells us, from a skin bought at Amsterdam, and said to have been obtained from the Cape of Good Hope. Pennant fully recognized its identity with Buffon’s “Tzeiran,” and remarked on the use of this erroneous Asiatic name for it. Sparrman, who arrived at the Cape in 1772 and subsequently made a long journey into the interior, tells us in his narrative[2] of having found a skin of the Blue-buck (which he identified with Pallas’s _A. leucophæa_ and Pennant’s “Blue Antelope”) preserved at “Krakeel-rivier,” but he does not appear to have met with it alive himself. But a rather later explorer of the Cape Colony, the well-known French naturalist François Le Vaillant, author of the ‘Oiseaux d’Afrique’ and many other ornithological works, was more fortunate. As Le Vaillant appears to have been the only traveller known to have himself obtained an example of this now extinct species, we will extract from the first volume of his ‘Voyage d’Afrique’ what he has written on this subject. On December 18th, 1781, Le Vaillant left Capetown to explore the country to the east called “Hottentot Holland.” A few days later, after crossing the river Sonder-end, and passing through the valley of Soete-Melck, he arrived at a place called “Tiger-Hoek,” where he had appointed some Hottentots to meet him, and went on the chase in their company:—