One bird's-nest taker whom we passed had just seen two elephants, and a great palaver ensued, in which the word 'harden,' or some such equivalent for ivory, frequently occurred. Many of the trees on the line of route were very fine, specially the tapangs, the splendid stems of which, supported by natural buttresses, rose in several instances at least two hundred feet from the ground, unbroken by a single branch. In the stem of the tapang the wild bees build their combs, and beeswax is an important and valuable product of the country. These trees, either singly or in groups, are the property by inheritance of the natives; so that whenever any attempt is made at clearing, or even cutting down a single tree, one of these small proprietors is sure to come forward and swear that his interest, derived from his father, his grandfather, or some even more remote ancestor, is likely to be affected. The timber itself is valuable, and where two buttresses occur exactly opposite to one another the width of the tree is often so great that large slabs, with a fine grain capable of taking a high polish, and large enough to form a dining-table for twenty-four people, have been cut from them. The Borneo jungle is so dense, and is so completely overshadowed by the trees rising from it, that there is no undergrowth, and the effect of bareness is produced; though I dare say that, if one could only look down on the forest from the car of a balloon, the flora of creepers, orchids, and parasites would be very beautiful wherever the light and air could penetrate.
Presently we came across a good subject for a sketch. I was waiting at the edge of a broad and winding river, shaded by tall trees, and flowing over a gravelly bed, while two men went on in advance to sound the depth of the stream before attempting to carry my chair across. Just then two hunters appeared from the forest and seated themselves on large mossy boulders a short distance apart. They put down beside them their baskets and bundles of nests, their little mat travelling-bags, and their elaborately carved and cased spears, holding fast to their kreises, parongs, and bows and arrows. They were literally armed to the teeth in their own fashion—a very formidable fashion it is too—and I very much doubt whether the gun which one of them had lying beside him was not the least terrible weapon which he possessed, so skilled are they in the use of their simpler implements of the chase and of warfare.
Continuing our difficult way, we at last emerged from the green darkness of the forest and found ourselves within view of the limestone rock or mountain in which are the marvellous bird's-nest caves which we had come so far to see. The cliff presented a striking effect, rising white and shining in the bright sunlight, slightly veiled by the tall trees and creepers, the leaves of which shimmered in the hot noontide haze. The dark entrance to the caves, stuffy as it was, and obstructed by the curious framework of rattans on which the nest-hunters sleep and cook and stow their arms, was a pleasant relief to the heat and glare without. Still more welcome was the sight of the coolies bringing refreshments and cooling drinks. If I, who had been carried all the way in comparative luxury, felt glad to see them, it can be imagined what must have been the feelings of the rest of the party, including Mabelle, who had walked the whole distance, and struggled gallantly over a most uncertain and treacherous forest track. We were not able to get into the cave at the opening where the men were encamped, and had to go some way round to another entrance.
From this point, each provided with a candle to light our way, we advanced into the darkness, stumbling, sliding, and occasionally falling on the slippery rocks, but still able to admire the noble proportions of the caves, their lofty grandeur, and the fantastic shapes of the limestone pillars by which the vaulted roof was supported. The whirring, fluttering, and twittering of many birds and bats could plainly be heard in the larger caves, which were densely peopled with winged and feathered inhabitants, and the roofs and sides of which were blackened by their nests. The Segama River, which we had ascended earlier, flows through these vast caverns, sometimes over a hard, stony bottom, but oftener over or through a mass of guano many feet in thickness, into which our guides more than once sank suddenly, emerging in a state which can be better imagined than described. Split palms were laid across the most awkward places; but it was extremely difficult to keep one's footing on this primitive causeway, and despite the assistance of the gentlemen, who carried me across many of the streams, it was impossible to escape an occasional wetting.
At one point the guides and leading members of the party, going on rather too rapidly, left us in complete darkness, and after waiting some time in the hope that they would discover their mistake and return, we had no alternative but to struggle up a most fearful precipice towards the only ray of light which we could see in the distance. It really was hard work, not only on account of the steepness of the ascent, but of the slippery and slimy condition of the rocks. Sometimes we knocked ourselves with painful abruptness against hard projections, at other times we sank to our knees in a mass of soft, wet guano teeming with animal life of various kinds, but mostly of the biting or stinging character. Mr. Crocker slipped and fell down some thirty feet or so, but fortunately emerged unhurt, though covered with black slime from the crown of his head to the sole of his foot.
After tremendous exertions we reached the end of our climb, during which I had been not only once but many times sorely tempted, and even strongly urged, to turn back. When we paused to rest, our eyes, by this time accustomed to the dim religious light, could perceive human figures crawling and clambering about the roof and pinnacles of the vast cavern in which we now found ourselves, and could observe many narrow rattan ladders hanging in the most precipitous places, or stretching horizontally across almost unfathomable abysses.
Fixed among the rocks on every side were strong hooks and pegs, to which the intrepid monkey-like nest-hunters attach their long, swinging ladders. Clinging to these, they proceed to prod all the nests within reach with a long bamboo pole, split into the shape of a three-pronged fork at one end, with a candle attached. They easily detach the nests, and rapidly transfer them to a basket hanging by their side. Having cleared the accessible space around them, they then unhook one end of their frail ladders and set themselves swinging like a pendulum, until they manage to catch another hook or peg, and then proceed to clear another space in the same way.
All this goes on throughout the day, and very often throughout the night as well, for the birds are then at home, and by their appearance the natives can judge more accurately of the age of the nests, on which their value depends. Occasionally, but not very often, a ladder breaks or a peg becomes rotten, and the hardy climbers tumble into the depths below, with almost invariably fatal results. The ladders employed are sometimes, I was told, as much as 500 feet in length, and we saw some ourselves over 150 feet long. Truly the seekers after birds and their belongings, whether eggs, feathers, or nests, are a daring race, alike on the storm-beaten cliffs of St. Kilda and of Norway and in the mysterious caves of Borneo and of Java.
Imagine our disappointment when, after another severe effort, we reached the fissure in the rock which admitted the light from above, and found that it afforded no means of egress except for bats and birds. Not even a Dyak or Sulu could have squeezed his way in or out by it, and there was nothing for it but to retrace our steps. Fortunately, however, we had not gone far before we met our guides with lights coming at last to look for us, and they led us to a comparatively easy exit from the cave; though in order to reach it we had to pass over horrible morasses of guano, into which we were only prevented from sinking by a path or bridge of two-inch palm stems affording a most uncertain foothold. On the way we passed more nest-hunters, and at the mouth of the cave we found another camp of wooden framework huts, on the top of which lay several men smoking, with their kreises, parongs, spears, and travelling-bags of matwork beside them. They would not part with any of their weapons or implements, even for more than four times their value, alleging that it would bring them ill-luck to sell them while engaged in an expedition, but adding that if we would go to their village, after their return, they would not only sell but willingly give us anything we might take a fancy to.