Harry did as he was told, following Arianwen's instructions on positioning and adjustment until the arm was just right. Then the medi-witch began a series of delicate spells, reattaching bone and sinew and the arterial pathways. It was slow work, taking over two hours to completely link everything back together. By the end of it, Harry's own arms felt like they were about to fall off, from holding Sally's in position for so long.