When Harry arrives at Hogwarts, Dumbledore tells him about the secrets of the Mirror of Erised, claiming that when he looks into it, he sees himself "holding a pair of thick, woollen socks."
Saat Harry tiba di Hogwarts, Dumbledore memberitahu Harry tentang rahasia Cermin Tarsah yang jika ia melihat cermin tersebut, ia melihat dirinya "memegang sepasang kaos kaki wol tebal."