ten o'clock
`` How far do we go to-day , Frank ? '' `` Eighteen miles is the scheduled distance , '' answered Frank . `` How fast do men march ? '' `` Three miles an hour , '' said I. `` Then we shall be in camp by ten o'clock . I do n't see the sense of yanking a fellow out of bed in the night . '' `` Of course , Henry , there 's a good reason for everything done in the army , '' observed Frank , with soldierly loyalty . `` Where 's the sense of marching in the dark when the whole distance can be done in six hours , and the sun rises at five and sets at seven ?