That evening the anchor was dropped off the mouth of the Parang river; and as the night closed in all eyes were directed to the thickly-wooded country on each side of the stream, whose banks were hidden by the dense growth of mangrove trees, which, now that the tide was up, seemed to be growing right out of the water, which those on board could see through their glasses to be smoothly flowing amidst the stems. Further inland tall columnar nipah palms could be seen fringing the tidal way, and apparently growing amidst the mangroves, with the water washing their roots. Dense green vegetation, and a broad flowing muddy river--that was all that greeted the eyes of the eager lookers-on, till darkness set in. Not a trace of town or village, not even a fisherman's hut or a boat. All was vegetation and the flowing river. Once Bob Roberts thought he saw a boat coming down the stream, and in the distance it very strangely resembled some little craft with upright mast and dark sail; but as it came nearer it proved to be a patch of root-matted vegetable soil, washed from the bank, and having in the centre a small nipah palm, which slowly passed from might, to be cast ashore upon some mud bank, and again take root. But as the darkness fell, the distant glitter as of tiny sparks amidst the trees took the attention of all. They were too distant to see the phenomenon to perfection; but the faint sparkle was very beautiful as the myriads of fire-flies, by which it was caused, flitted and changed from place to place, which was now dark, now scintillating in a most peculiar manner. The captain had decided not to attempt the passage of the river till morning, all on board being very ignorant of its entrance, though, judging from the configuration of the coast, the most they had to dread was being grounded for a time on some bank of mud or sand. This part of the coast was so sheltered that there was no surf; and when the anchor was let go, the corvette swung round easily, to lie almost without motion on the calm still waters of the river's mouth. But though no sign of human habitation had been visible, as the night wore on those on board became fully aware of the fact that the jungle had plenty of denizens, for from time to time strange roarings were heard, and then splashings in the water, as of wild creatures bathing. Once or twice too, as Bob Roberts and Ensign Long, companions for the time being, if not friends, leaned over the bulwarks, they fancied they could hear some great beast swimming towards them. "What can it be?" said Bob in an awe-stricken whisper, as the strange snorting and splashing grew nearer. "'Nosserus," said Dick the sailor, who generally contrived to be pretty close to the youths, and depended upon them largely for his supplies of tobacco. "It's one on 'em having a wallow, like a big pig, somewhere in the shallows." "That's a tiger, isn't it!" said Tom Long, as a hoarse roar came over the smooth surface of the water.