four o'clock
With this several small trees were cut down , and a pair of oars fashioned for each , and within an hour they were on their way down the stream , and in two hours more had rounded the point of projecting land east of the river mouth . `` Do n't let us take any more chances of losing this boat . I am in favor of taking it around , and am willing to risk the tide , whatever it may be . '' Harry 's suggestion met with favor on the part of George , and when the point was rounded and they were out in the ocean , the tide , although coming in , had no terrors for them , but they boldly plied the oars , and before four o'clock had rounded the cliff point , and steered the craft into the mouth of Cataract River . The Cataract was a much smaller stream than South River , and it was on the northern side of the island ; whereas South River was on the southerly side of the island . Less than a quarter of a mile from the open sea was a cataract , at which their home was located , and the cataract was utilized as the means for producing water power . Their appearance below the Cataract was hailed with delight by the Professor , and you may be sure that when the boat was finally landed and hauled up on the beach , all of them joined in the congratulations , which was their due .