It had wedged round pebbles into chinks and crannies of the rocks so firmly that, though they looked quite loose, they could not be moved except with a hammer. The mighty power of the water here seen gave us an idea of what is going on in thousands of cataracts in the world. All the information we had been able to obtain from our Portuguese friends amounted to this, that some three or four detached rocks jutted out of the river in Kebrabasa, which, though dangerous to the cumbersome native canoes, could be easily passed by a steamer, and that if one or two of these obstructions were blasted away with gunpowder, no difficulty would hereafter be experienced. After we had painfully explored seven or eight miles of the rapid, we returned to the vessel satisfied that much greater labour was requisite for the mere examination of the cataracts than our friends supposed necessary to remove them; we therefore went down the river for fresh supplies, and made preparation for a more serious survey of this region. The steamer having returned from the bar, we set out on the 22nd of November to examine the rapids of Kebrabasa. We reached the foot of the hills again, late in the afternoon of the 24th, and anchored in the stream. Canoe-men never sleep on the river, but always spend the night on shore. The natives on the right bank, in the country called Shidima, who are Banyai, and even at this short distance from Tette, independent, and accustomed to lord it over Portuguese traders, wondered what could be our object in remaining afloat, and were naturally suspicious at our departing from the universal custom. They hailed us from the bank in the evening with "Why don't you come and sleep onshore like other people?" The answer they received from our Makololo, who now felt as independent as the Banyai, was, "We are held to the bottom with iron; you may see we are not like your Bazungu." This hint, a little amplified, saved us from the usual exactions. It is pleasant to give a present, but that pleasure the Banyai usually deny to strangers by making it a fine, and demanding it in such a supercilious way, that only a sorely cowed trader could bear it. They often refuse to touch what is offered--throw it down and leave it--sneer at the trader's slaves, and refuse a passage until the tribute is raised to the utmost extent of his means.