The valley had become very narrow and airless; foliage close shut above; dry bed of the stream much excavated, so that I passed under fallen trees without stooping. Suddenly it turned sharply to the north, at right angles to its former direction; I heard living water, and came in view of a tall face of rock and the stream spraying down it; it might have been climbed, but it would have been dangerous, and I had to make my way up the steep earth banks, where there is nowhere any footing for man, only fallen trees, which made the rounds of my ladder. I was near the top of this climb, which was very hot and steep, and the pulses were buzzing all over my body, when I made sure there was one external sound in my ears, and paused to listen. No mistake; a sound of a mill-wheel thundering, I thought, close by, yet below me, a huge mill-wheel, yet not going steadily, but with a SCHOTTISCHE movement, and at each fresh impetus shaking the mountain. There, where I was, I just put down the sound to the mystery of the bush; where no sound now surprises me - and any sound alarms; I only thought it would give Jack a fine fright, down where he stood tied to a tree by himself, and he was badly enough scared when I left him. The good folks at home identified it; it was a sharp earthquake.
At the top of the climb I made my way again to the water- course; it is here running steady and pretty full; strange these intermittencies - and just a little below the main stream is quite dry, and all the original brook has gone down some lava gallery of the mountain - and just a little further below, it begins picking up from the left hand in little boggy tributaries, and in the inside of a hundred yards has grown a brook again. The general course of the brook was, I guess, S.E.; the valley still very deep and whelmed in wood. It seemed a swindle to have made so sheer a climb and still find yourself at the bottom of a well. But gradually the thing seemed to shallow, the trees to seem poorer and smaller; I could see more and more of the silver sprinkles of sky among the foliage, instead of the sombre piling up of tree behind tree. And here I had two scares - first, away up on my right hand I heard a bull low; I think it was a bull from the quality of the low, which was singularly songful and beautiful; the bulls belong to me, but how did I know that the bull was aware of that? and my advance guard not being at all properly armed, we advanced with great precaution until I was satisfied that I was passing eastward of the enemy. It was during this period that a pool of the river suddenly boiled up in my face in a little fountain. It was in a very dreary, marshy part among dilapidated trees that you see through holes in the trunks of; and if any kind of beast or elf or devil had come out of that sudden silver ebullition, I declare I do not think I should have been surprised. It was perhaps a thing as curious - a fish, with which these head waters of the stream are alive. They are some of them as long as my finger, should be easily caught in these shallows, and some day I'll have a dish of them.
Very soon after I came to where the stream collects in another banana swamp, with the bananas bearing well. Beyond, the course is again quite dry; it mounts with a sharp turn a very steep face of the mountain, and then stops abruptly at the lip of a plateau, I suppose the top of Vaea mountain: plainly no more springs here - there was no smallest furrow of a watercourse beyond - and my task might be said to be accomplished. But such is the animated spirit in the service that the whole advance guard expressed a sentiment of disappointment that an exploration, so far successfully conducted, should come to a stop in the most promising view of fresh successes. And though unprovided either with compass or cutlass, it was determined to push some way along the plateau, marking our direction by the laborious process of bending down, sitting upon, and thus breaking the wild cocoanut trees. This was the less regretted by all from a delightful discovery made of a huge banyan growing here in the bush, with flying-buttressed flying buttresses, and huge arcs of trunk hanging high overhead and trailing down new complications of root.