St. Paul house covered in old hand-painted signs

Beneath the asbestos shingles, and beneath a layer of cedar shakes behind that, Todd Johnson found something unexpected covering his 1881 house: Old hand-painted signs. It seems that boards that were painted signs on even older buildings were recycled when Johnson's Holly Avenue house was built. We talk to Johnson and Jim Sazevich, a St. Paul historian, about this recycled bit of St. Paul history and where those hand-painted boards might have come from.