ten o'clock
By this time Sam and Randolph Rover were coming up , and also one of Dick Chester 's friends . The college students were introduced to the others by Tom , and then a general hunt began for Dick , which lasted until the shades of night had fallen . But poor Dick was not found , and all wondered greatly what had , become of him . Tom and the others retired at ten o'clock . But not to sleep , for with Dick missing none of the Rovers could close an eye . `` We must find him in the morning , '' said Sam . `` We simply must ! ''