Special attention is claimed by the _Ba-Shilange_ nation, for our knowledge of whom we are indebted chiefly to C. S. Latrobe Bateman[276]. These are the people whom Wissmann had already referred to as "a nation of thinkers with the interrogative 'why' constantly on their lips." Bateman also describes them as "thoroughly honest, brave to foolhardiness, and faithful to each other. They are prejudiced in favour of foreign customs and spontaneously copy the usages of civilisation. They are the only African tribe among whom I have observed anything like a becoming conjugal affection and regard. To say nothing of such recommendations as their emancipation from fetishism, their ancient abandonment of cannibalism, and their national unity under the sway of a really princely prince (Kalemba), I believe them to be the most open to the best influences of civilisation of any African tribe whatsoever[277]." Their territory about the Lulua, affluent of the Kassai, is the so-called Lubuka, or land of "Friendship," the theatre of a remarkable social revolution, carried out independently of all European influences, in fact before the arrival of any whites on the scene. It was initiated by the secret brotherhood of the _Bena-Riamba_, or "Sons of Hemp," established about 1870, when the nation became divided into two parties over the question throwing the country open to foreign trade. The king having sided with the "Progressives," the "Conservatives" were worsted with much bloodshed, whereupon the barriers of seclusion were swept away. Trading relations being at once established with the outer world, the custom of _riamba_ (bhang) smoking was unfortunately introduced through the Swahili traders from Zanzibar. The practice itself soon became associated with mystic rites, and was followed by a general deterioration of morals throughout Tushilangeland.