two o'clock
Shortly after midnight , Max , Dale , and Dubec made their way silently to the little cache of shells in the river bank , and began transporting them to a point as near the power-house as they could expect to get without attracting notice . There was a bright moon , but there were also clouds , and they patiently bided their time , and moved only when the moon was obscured . It was one o'clock before the whole of the shells had been transported within easy reach of the power-house . The sentries were changed at two o'clock , and Max and Dale waited only until this had been completed . Then they drew near , and took a long look at the sentry upon the least-exposed corner of the building . He was a young fellow , and while not looking particularly alert , yet seemed fully alive to his duties and determined to carry them out . As has already been explained , he was posted at a corner of the building , and could command a view of two sides .