four o'clock
If they could have found an alarm clock somewhere it would have been easy for them to rise as early in the morning as they wished . But lacking a clock of that kind -- or any other -- they had to find a different way of waking themselves . That was why the workers chose one of their number to be a trumpeter . And it was her duty to get up bright and early , at three or four o'clock , and trumpet loudly to rouse all the other workers . How the trumpeter herself managed to awake is something that never bothered anybody else . It was her business not to oversleep . And she knew that it would be very unpleasant for her if she failed even once to do her duty .