midnight
For some time he stood thus , eyes and ears alert , though he lounged in the shadow where he was not likely to be seen . `` It 's an off night for plebe mischief , I reckon , '' he murmured at last . `` All the plebes are good little boys to-night , and safely tucked in their cribs . '' At last , when it was near midnight , Prescott came out from his place of semi-concealment and stepped over near the guard line . It was not long ere a yearling sentry , with bayonet fixed and gun resting over his right shoulder , came pacing toward the first classman . Recognizing a cadet officer , the yearling sentry halted , holding his piece at `` present arms . '' `` Walk your post , '' Dick directed , after having returned the salute .