When Maya returned from having her hair cut this afternoon, it was not immediately apparent that anything had changed.  Fortunately, we had before and after photographs, which when studied carefully, revealed a 4 inch change in length.  I spent several hours tracking down an electrical problem which I traced to a circuit breaker which had tripped but still appeared to be in the on position.  Maya assisted with the project as we checked voltage on every breaker in the house.  Naturally, the guilty breaker was one of the last we probed.