Harry didn’t tell anyone about the Serpent Slayer when they got back to the Burrow, and he kept the backpack hidden inside his trunk all the way up until it was time to go the following morning. He had an odd sense of déjà vu as he witnessed the utter chaos of trying to get all the Weasleys plus himself and Hermione into three ordinary Muggle taxis with all their stuff. It was amusing, but at the same time Harry felt a sense of wistful sadness that Hermione noticed. When she gave him an inquiring look, Harry shook his head and spent the entire journey to King’s Cross looking out the window, unaware that he was actually crying.