Where was the river? That was the first problem to be solved, and of this there appeared to be no possible solution. There was no sun to guide them; no visible sky. Even had there been both, it would scarce have mended the matter. The steersman could not tell whether, on straying from the channel, he had drifted to the south or the north, the east or the west; and, indeed, an intellect less obtuse than that of Tipperary Tom might have been puzzled upon the point. It has been already mentioned, that the Solimoës is so tortuous as to turn to every point of the compass in its slow course. The mere fact that the moon was shining at the time could be of little use to Tipperary Tom, whose astronomy had never extended beyond the knowledge that there was a moon. Where lay the river? The interrogatory was repeated a score of times, without receiving a satisfactory answer; though every one on board--the little Rosita excepted--ventured some sort of reply, most, however, offering their opinion with a doubting diffidence. The Mundurucú, although repeatedly appealed to, had taken small part in the discussion, remaining silent, his eyes moodily wandering over the water, seeking through the fog for some clew to their escape from the spot. No one plied the paddles; they had impelled her out of sight of the sapucaya, now shrouded in the thick fog; but, as it was useless paddling any farther, all hands had desisted, and were now resting upon their oars. At this moment it was perceived that the galatea was in motion. The Mundurucú was the first to notice it; for his attention had for some time been directed to such discovery. For this reason had he cast his searching glances, now down into the turbid waters, and now out through the murky atmosphere. A thicket was discernible through the fog, but every moment becoming less distinct. Of course it was only a collection of tree-tops; but whatever it was, it soon became evident that the galatea was very slowly receding from it. On discovering this, the Mundurucú displayed signs of fresh animation. He had been for some minutes lying upon his face, craning out over the gangway, and his long withered arms submerged in the water. The others occupied themselves in guessing what he was about; but their guesses had been to no purpose. Equally purposeless had appeared the actions of the Indian; for, after keeping his arm under water for a period of several minutes, he drew it in with a dissatisfied air, and once more arose to his feet. It was just then that he perceived the tree-tops, upon which he kept his eyes sharply fixed, until assured that the galatea was going away from them. "_Hoola!_" he exclaimed, attempting to imitate the cry he had more than once heard issuing from the lips of Tipperary Tom. "_Hoola!_ the river is out there!" As he spoke, he pointed towards the tree-tops. It was the first confident answer to the all-important question. "How can you tell that, Munday?" inquired the captain of the craft.