about midnight
`` I believe the job was done in the dark , '' said Dick . `` Somebody must have visited our tent last night after we went to sleep . '' `` When did you go to sleep , Richard ? '' `` Well , I do n't think we were real sound asleep until about midnight . There was some sort of a noise in the camp that kept us awake . '' `` Somebody said Tubbs was up playing negro minstrel , '' added Tom , soberly . `` Yes , he was up .