Hume had found a serpentine sheet of water to the north which he was inclined to think was the continuation of the elusive Macquarie. He had pushed on past it, but had been checked by another body of reed beds. It was decided to shift camp to this lagoon and launch the boat once more; but without result, for the boat was hauled ashore again after having vainly followed the supposed channel in amongst reeds and shallows. Again the leader and his second went forward on a scouting trip. Each took with them two men; Sturt going to the north-west, and Hume to the north-east. They left on the last day of December, 1828. Sturt toiled on until after sunset he came to a northward-flowing creek, in which there was a fair supply of water. Next day their course lay through plains intersected with belts of scrub, and they discovered another creek, inferior to the last one both in size and the quality of the water. They camped for a few hours on its bank, and Sturt called it New Year's Creek, but it is now known as the Bogan River. They were about to pass that night without water on the edge of a dry plain, when one of the men had his attention drawn to the flight of a pigeon, and searching, found a puddle of rain water which barely satisfied them. An isolated hill with perpendicular sides, which Sturt had noticed for some time, now attracted his attention, as being a lofty point of vantage from which to get an extensive view to the west. They accordingly made for it, over more promising country. They reached the hill which Sturt called Oxley's Tableland, but from its summit he saw nothing but a stretch of monotonous plain, with no sign of the long-sought river. That night they camped at a small swamp, and the next morning turned back, Sturt agreeing with Oxley, but without as much reason, that "the space I traversed is unlikely to become the haunt of civilised man." Hume did not return until the day after Sturt's arrival. He reported that the Castlereagh River must have suddenly turned to the north below where Oxley crossed it, for he had been unable to find it. He had gone westward, but had seen nothing except far-stretching plains. After a few aimless and unprofitable ramblings, they made their way again to Oxley's Tableland, and Sturt and Hume, with two men, made a journey to the west, with only a negative result. On the 31st of January they commenced to follow down Sturt's New Year's Creek, and the next day, to their unbounded surprise, came upon the bank of a noble river. From its size and width they judged they had struck it at a point as far from its source as from its termination; but when the men rushed tumultuously down the bank to revel in the water and quench their thirst, they cried out, with disgust and surprise, that the water was salt.