After that I ate some luncheon, and sunned myself on a flat rock.

'I have discovered the source of the Labongo,' I said to myself.

'I will write to the Royal Geographical Society, and they will give me a medal.' I walked round the lake to look for an outlet.

A fine mountain stream came in at the north end, and at the south end, sure enough, a considerable river debauched.

My exploring zeal redoubled, and I followed its course in a delirium of expectation.