Rebuilding ...

... a large ramshackle house on Market Street, which has been unoccupied as long as I can remember  (it's on my walk downtown).  This evening we watched a superb program on the crash of the Hindenburg Zeppelin in 1937, based on an amateur film that has recently come to light. My father would have found it intriguing, since it focused on the deciphering the precise mechanism by which a spark occurred and ignited the craft's hydrogen.