one o'clock
All arose at the shout of the sentry on Number One , turning out the guard for the officer of the day . Chester made hurried and impatient acknowledgment of the salute , and called to the sergeant to send him the sentry who was at the bridge at one o'clock . It turned out to be a young soldier who had enlisted at the post only six months before and was already known as one of the most intelligent and promising candidates for a corporalship in the garrison . `` Were you on duty at the bridge at one o'clock , Carey ? '' asked the captain . `` I was , sir . My relief went on at 11.45 and came off at 1.45 . ''