Dumbledore didn't know for how long he stood there watching the spot where the Riddle heirs had stood. He couldn't believe it, neither of them saw anything, maybe it would be alright this time, maybe they wouldn't take after their late Father. Smiling he left the room making sure the Charms were in place, only the truly curious could enter, he had to ensure Henry Potter found the mirror and saved the stone, the boy had to believe he could defeat the Dark Lord when he returned. Having The Dark Lord's son and daughter on the light side could only helped their mission and their power.