Taken as a whole there can, however, be no question but that the classification proposed by Sir William was an extremely valuable contribution to systematic anthropology. The last two really important contributions to anthropology made by Sir William were both published in 1888: the one, under the title of “The Pygmy Races of Man,” in the _Proceedings_ of the Royal Institution (forming an address); and the other, entitled “Description of Two Skeletons of Akkas, a Pygmy Race from Central Africa,” in the _Journal_ of the Anthropological Institute. The second of these two communications dealt with two imperfect skeletons—male and female—of the pigmy African race known as Akkas, obtained by the late Dr. Emin Pasha at Monbotto during his last expedition. The female specimen, which is the least imperfect of the two, and is said to be that of a very old individual, is now mounted in the Natural History Museum. In general character, the skulls were found to come very close to the Negro type; it is true they are somewhat less elongated, but the relative breadth proved to be much less than the describer was led to expect from what had been previously written with regard to the craniology of this tribe. The whole skeleton fully confirmed earlier statements that the Akkas are the most diminutive living people. They are quite distinct from the African Bushmen (characterised, among other features, by their tawny skins), and also from the Asiatic Negritos, as represented by the Andamanese; and they accordingly seem rightly referred to a distinct branch of the Negro stock, for which the name Negrillo has been suggested. In the first of the two papers cited above, Sir William gave a general account of all the races of mankind which can be included under the title of “pigmies,” such as the Bushmen, Negrillos, and Negritos. As regards the second group he wrote as follows:—