From some of the peculiarities of the Achua (Wochua) Negrilloes met by Junker south of the Welle one can understand why these little people were such favourites with the old Egyptian kings. These were "distinguished by sharp powers of observation, amazing talent for mimicry, and a good memory. A striking proof of this was afforded by an Achua whom I had seen and measured four years previously in Rumbek, and now again met at Gambari's. His comic ways and quick nimble movements made this little fellow the clown of our society. He imitated with marvellous fidelity the peculiarities of persons whom he had once seen; for instance, the gestures and facial expressions of Jussuf Pasha esh-Shelahis and of Haj Halil at their devotions, as well as the address and movements of Emin Pasha, 'with the four eyes' (spectacles). His imitation of Hawash Effendi in a towering rage, storming and abusing everybody, was a great success; and now he took me off to the life, rehearsing after four years, down to the minutest details, and with surprising accuracy, my anthropometric performance when measuring his body at Rumbek[300]." A somewhat similar account is given by Ludwig Wolf of the Ba-Twa pygmies visited by him and Wissmann in the Kassai region. Here are whole villages in the forest-glades inhabited by little people with an average height of about 4 feet 3 inches. They are nomads, occupied exclusively with hunting and the preparation of palm-wine, and are regarded by their Ba-Kubu neighbours as benevolent little people, whose special mission is to provide the surrounding tribes with game and palm-wine in exchange for manioc, maize, and bananas[301]. Despite the above-mentioned deviations, occurring chiefly about the borderlands, considerable uniformity both of physical and mental characters is found to prevail amongst the typical Negrillo groups scattered in small hunting communities all over the Welle, Semliki, Congo, and Ogowai woodlands. Their main characters are thus described. Their skin is of a reddish or yellowish brown in colour, sometimes very dark. Their height varies from 1.37 m. to 1.45 m. (4 ft. 4-1/4 in. to 4 ft. 9-1/4 in.[302]). Their hair is very short and woolly, usually of a dark rusty brown colour; the face hair is variable, but the body is usually covered with a light downy hair. The cephalic index is 79. The nose is very broad and exceptionally flattened at the root; the lips are usually thin, and the upper one long; the eyes are protuberant; the face is sometimes prognathic. Steatopygia occurs. They are a markedly intelligent people, innately musical, cunning, revengeful and suspicious in disposition, but they never steal.