[ That's not surprising either, considering how he found Alfie and Royce not too long ago. ]

House has them marked on his map already. They're the buildings outlined in heavy black. There's quite a few spots in the residential area, and apparently they go all the way back to where the hospital is. Would've been nicer if they made it back to the grocery store- I'd really like to see that someday- but hey, they're useful anyway.