All this time we were heading straight for a low, heavily timbered point which marked another turn in the course of the stream, and I could see that our people were straining every nerve to get round this point before being overtaken.  At length, with a mighty stirring up of the mud by our deep-plunging paddles in the shallow water, we shaved close round this point and almost immediately afterwards darted into a narrow creek so completely overgrown with vegetation that the boughs of the mangroves and other trees united over our heads, forming a sort of tunnel, the interior of which was so opaquely dark that it was scarcely possible to see one's hand before one's face.  Yet our helmsman seemed to know the place perfectly, for he stood boldly on, urging the crew to continue their exertions.  At length, after we had traversed a full hundred yards or more of the creek, we sighted a spot ahead where, doubtless in consequence of a wind-fall, or some similar phenomenon, the dense bush had been levelled, leaving room for a patch of clear moonlight, some ten yards in circumference, to fall full upon the channel of the creek, revealing every object, even the smallest, within its boundary with a clearness and distinctness that was positively startling.  Arrived here, the canoe was sheered in alongside a spot where the mangroves grew thickly, and some twenty of our crew, laying in their paddles, hastily seized their bows and arrows and, springing ashore, swiftly vanished into the adjacent deep shadow, while the canoe, with the remainder of us on board, pushed across the patch of moonlight into the darkness beyond, where she was forced beneath an overhanging mass of foliage, in such a manner as to lie perfectly concealed.