James didn't know what to tell him. There weren't just houses, there were apartment buildings, which meant that there were more places on this street than immediately met the eye.
"It'll be a magical house or flat, and we're in the middle of a Muggle neighborhood," he said, thinking hard as he followed George. "But that means it's likely to be hidden from wizards. See if you can find any place with wards, magical signatures - worth a try, at any rate."
He wasn't holding out much hope. This invisible enemy of theirs was proving to be well-hidden, and no doubt he was already quite a few steps ahead of them in concealing George. Now they had two people to rescue.