"Harry is heavily into ritual magic these days," Hermione explained. "On the first sub-level of the palace, he built a special chamber to conduct all sorts of advanced spellcraft. He wants to take Celesca inside and have her use her Seer magic to, essentially, remote view the site of my parent's burial. The magic of the chamber should enhance the accuracy of her visions of the future, so if she can imagine Harry finding the right bones it will help him immensely."