ten o'clock
You will want to hear from your father . '' Penn hastily thought of a plan . `` Send Toby to the round rock , -- he knows where it is , -- on the side of the mountain . Between nine and ten o'clock to-morrow night . I will try to communicate with him there . '' And Penn , bidding the young girl be of good cheer , departed as suddenly as he had arrived . The old negro accompanied him , assisting to carry the burdens .