"Yeah, great," Ron muttered - more relieved to see her smile than he let on. "I can just imagine - 'Weasley, he'll probably turn tail at some point, better give him the retrace-your-steps gadget.'" But don't tell him what it is, let him stew on it for a while. Damn the man. "I guess it's not much worse than a book that points you in a hundred different directions."