Keep a lookout? Well, you may guess I watched the fog for the signs of lifting as a cat watches a mouse; but for anything else our eyes were of no more use to us than if we had been buried miles deep in a heap of cotton-wool. It felt like it, too -- choking, warm, stifling. Besides, all I said, though it sounded extravagant, was absolutely true to fact. What we afterwards alluded to as an attack was really an attempt at repulse. The action was very far from being aggressive -- it was not even defensive, in the usual sense: it was undertaken under the stress of desperation, and in its essence was purely protective.

     It developed itself, I should say, two hours after the fog lifted, and its commencement was at a spot, roughly speaking, about a mile and a half below Kurtz's station. We had just floundered and flopped round a bend, when I saw an islet, a mere grassy hummock of bright green, in the middle of the stream.