At a yard sale, Jonathan R. Distel purchased some of these dividers, scribes, calipers, and squares, which were stamped with the initials “F. C.” When he asked what the initials stood for, the woman explained she was the granddaughter of Frank Cornell, the Philadelphia industrialist who built a 300-acre estate in 1929 and the tools she was selling were all his. Later that same year, Jon found himself working on and managing the restoration of the very same Main Line Estate, where he used some of the tools Cornell himself may have used there seventy years earlier.