two o'clock
After the first half-hour the young guard in the silence that rested over the great river found the time dragging heavily . In order to keep awake he walked about the dock , peering intently in every direction . Not a sign of danger had been discovered , however , when at half-past twelve he summoned Grant to take his place . Grant also was not molested and when he called George at two o'clock he said sleepily , `` It all seems like fool business anyway , Pop . '' `` You 've been asleep , '' retorted George . `` I have n't closed my eyes , '' retorted Grant sharply . `` If you do as well you 'll be lucky . ''