George Hart...died 4-17-08 age 89. See Trains Magazine news wire 4-17 and Railpace hot news 4-18.
Biographies:
https://www.wikitree.com/wiki/Hart-20580
https://www.familysearch.org/tree/perso ... s/G8HP-QWN
He's distantly related to photographer and author Bert Pennypacker through the Rittenhouse family and other connections. Hartsville in Bucks County, Pennsylvania is named after his ancestors.