From Murembwe Point, having finished our coffee and ended our discourse on ethics, we proceeded on our voyage, steering for Cape Sentakeyi, which, though it was eight or ten miles away, we hoped to make before dark.  The Wangwana pulled with right good will, but ten hours went by, and night was drawing near, and we were still far from Sentakeyi.  As it was a fine moonlight night, and we were fully alive to the dangerous position in which we might find ourselves, they consented to pull an hour or two more.  About 1 P.M., we pulled in shore for a deserted spot—­a clean shelf of sand, about thirty feet long by ten deep, from which a clay bank rose about ten or twelve feet above, while on each side there were masses of disintegrated rock.  Here we thought, that by preserving some degree of silence, we might escape observation, and consequent annoyance, for a few hours, when, being rested, we might continue our journey.  Our kettle was boiling for tea, and the men had built a little fire for themselves, and had filled their black earthen pot with water for porridge, when our look-outs perceived dark forms creeping towards our bivouac.  Being hailed, they at once came forward, and saluted us with the native “Wake.”  Our guides explained that we were Wangwana, and intended to camp until morning, when, if they had anything to sell, we should be glad to trade with them.  They said they were rejoiced to hear this, and after they had exchanged a few words more—­during which time we observed that they were taking mental notes of the camp—­they went away.  Upon leaving, they promised to return in the morning with food, and make friends with us.  While drinking our tea, the look-outs warned us of the approach of a second party, which went through the same process of saluting and observing as the first had done.  These also went away, over-exuberant, as I thought, and were shortly succeeded by a third party, who came and went as the others had.  From all this we inferred that the news was spreading rapidly through the villages about, and we had noticed two canoes passing backwards and forwards with rather more haste than we deemed usual or necessary.  We had good cause to be suspicious; it is not customary for people (at least, between Ujiji and Zanzibar) to be about visiting and saluting after dark, under any pretence; it is not permitted to persons to prowl about camp after dark without being shot at; and this going backward and forward, this ostentatious exuberance of joy at the arrival of a small party of Wangwana, which in many parts of Urundi would be regarded as a very common event, was altogether very suspicious.  While the Doctor and I were arriving at the conclusion that these movements were preliminary to or significant of hostility, a fourth body, very boisterous and loud, came and visited us.  Our supper had been by this time despatched, and we thought it high time to act.  The fourth party having gone with extravagant manifestations