Here is a pretty interesting website showing archives from The New Jersey Historical Society for The Pennington-Satterthwaite Family. The papers are dated from 1797 to 1967.
According to the JFMF, this Pennington family is connected to PRA Family Group 1. The biographical note has some excellent genealogy information for those researching New Jersey and/or Group 1.
Click on the link below and then just enjoy the reading.