As he spoke he went to the other side of the little rock pool, which was not above a foot deep and about four across, lying close up to the foot of one of the great rock walls which grew more frequent the higher they ascended. Then together they dipped a hand in the soft, cool, limpid fluid, and raised it to their lips. "Poof!" ejaculated Ned, spluttering the water away. "Oh, what a shame! There ought to be a notice up--Beware of the water. Why, it's like poison, sir. Ten times worse than that horrid stuff by the falls. Oh, come on. Only fancy for there to be water like that. Physic's nothing to it." Jack's disappointment was a little softened by his amusement, and they resumed their tramp, rising higher and higher as they kept up a diagonal course along the mountain slope; but the difficulties in the way, and the caution requisite in passing through what they felt to be a dangerous enemy's land, made the progress slow, and after a time they seated themselves for a rest upon one of the many moss-grown masses of lava rock they passed, beneath an umbrageous tree, in which a flock of tiny finch-like birds were twittering, and once more looked around. The prospect was not wide, for they were surrounded by trees, and it was only by keeping close to one or other of the many lava rivers, where the growth of the forest was scanty, that they were able to progress as they did. "Nothing to eat, nothing to drink," groaned Ned. "I say, Mr Jack, this is getting serious. What's to be done?" "Rest a bit, and then at the first opportunity, say as soon as we have passed over that knoll there, let's begin to descend toward the shore. I hope we shall miss the blacks then." "And come across some one looking for us, sir, and carrying a basket. If it was only a bit of hard ship's biscuit now, I wouldn't care." "Hark! What's that?" "Cockatoo, sir," whispered Ned. "I know their screech. I'll go and try and get a shot at him." "Better sit still and rest, and chance the flock coming near. If you follow them they'll hear you, and lead you farther and farther away." "Yes, I know that, sir, but I'm so hungry, and I'm afraid to begin chewing leaves for fear of poison. Hullo! Don't move, sir. Hear that? You're right, this is the best way and the easiest." "What shall we do, Ned, shoot, or try to get at them with the spears?" "Let's see 'em first, sir," said Ned wisely, "and wait our chance, and then do both." The objects which had excited their attention by sundry familiar sounding grunts were not long in showing themselves in the shape of a little herd of pigs, three old ones and about a dozen half-grown; and as they came down a slope to their left, and began rooting about under the trees a couple of hundred yards away, Ned softly smacked his lips, looked at Jack, took out his brass matchbox, and said the expressive word "crackling."