"Pwyll of Dyfed suggested to me that Riddle has used other people, split their souls and trapped them inside objects, but cast all of the enchantments himself," Harry explained. "His magical signature is so strong that they would feel like his own Horcruxes. Well, to anyone but me, because I can feel the subtle difference in the energetic vibrations. I was intimate with the internal nuances of that twat for a long time, don't forget."