Twelve o'clock
`` Well , you 'll have only four hours of it , Randy , '' answered Jack . `` That is n't so very long . What time do you go on ? '' `` Twelve o'clock . Then I am to relieve Ned Lowe . '' Randy retired early , and was awakened about half past eleven o'clock . Then he dressed , got a cup of the hot chocolate that one of the cook 's helpers had ready for the sentries , and then went out to join the detail which was to go on guard from midnight until four o'clock in the morning .