The situation of Zumbo was admirably well chosen as a site for commerce. Looking backward we see a mass of high, dark mountains, covered with trees; behind us rises the fine high hill Mazanzwe, which stretches away northward along the left bank of the Loangwa; to the S.E. lies an open country, with a small round hill in the distance called Tofulo. The merchants, as they sat beneath the verandahs in front of their houses, had a magnificent view of the two rivers at their confluence; of their church at the angle; and of all the gardens which they had on both sides of the rivers. In these they cultivated wheat without irrigation, and, as the Portuguese assert, of a grain twice the size of that at Tete. From the guides we learned that the inhabitants had not imbibed much idea of Christianity, for they used the same term for the church bell which they did for a diviner's drum. From this point the merchants had water communication in three directions beyond, namely, from the Loangwa to the N.N.W., by the Kafue to the W., and by the Zambesi to the S.W. Their attention, however, was chiefly attracted to the N. or Londa; and the principal articles of trade were ivory and slaves. Private enterprise was always restrained, for the colonies of the Portuguese being strictly military, and the pay of the commandants being very small, the officers have always been obliged to engage in trade; and had they not employed their power to draw the trade to themselves by preventing private traders from making bargains beyond the villages, and only at regulated prices, they would have had no trade, as they themselves were obliged to remain always at their posts.
Several expeditions went to the north as far as to Cazembe, and Dr. Lacerda, himself commandant of Tete, went to that chief's residence. Unfortunately, he was cut off while there, and his papers, taken possession of by a Jesuit who accompanied him, were lost to the world. This Jesuit probably intended to act fairly and have them published; but soon after his return he was called away by death himself, and the papers were lost sight of. Dr. Lacerda had a strong desire to open up communication with Angola, which would have been of importance then, as affording a speedier mode of communication with Portugal than by the way of the Cape; but since the opening of the overland passage to India, a quicker transit is effected from Eastern Africa to Lisbon by way of the Red Sea. Besides Lacerda, Cazembe was visited by Pereira, who gave a glowing account of that chief's power, which none of my inquiries have confirmed. The people of Matiamvo stated to me that Cazembe was a vassal of their chief: and, from all the native visitors whom I have seen, he appears to be exactly like Shinte and Katema, only a little more powerful. The term "Emperor", which has been applied to him, seems totally inappropriate. The statement of Pereira that twenty negroes were slaughtered in a day, was not confirmed by any one else, though numbers may have been killed on some particular occasion during the time of his visit, for we find throughout all the country north of 20 Deg., which I consider to be real negro, the custom of slaughtering victims to accompany the departed soul of a chief, and human sacrifices are occasionally offered, and certain parts of the bodies are used as charms. It is on account of the existence of such rites, with the similarity of the language, and the fact that the names of rivers are repeated again and again from north to south through all that region, that I consider them to have been originally one family. The last expedition to Cazembe was somewhat of the same nature as the others, and failed in establishing a commerce, because the people of Cazembe, who had come to Tete to invite the Portuguese to visit them, had not been allowed to trade with whom they might. As it had not been free-trade there, Cazembe did not see why it should be free-trade at his town; he accordingly would not allow his people to furnish the party with food except at his price; and the expedition, being half starved in consequence, came away voting unanimously that Cazembe was a great bore.