four A.M.
And Captain Devers replied , -- `` Very good , sir . You 're relieved , '' and then turned to the new incumbent , Captain Rogers , of the infantry : `` I wish especial attention given to this matter , Captain Rogers , and probably I shall take a turn with you to-night after twelve . '' But that night long after twelve the whole post took a turn . It was towards four A.M. when the telegraph operator , who slept always beside his instrument , came banging at the door of `` A '' Troop 's office . It was opened by an indignant Irish sergeant . `` Go rout out the captain at once . You know how to rouse him and I do n't .