One summer I drove up to Trenton & Flemington, NJ for some research. I spent forever trying to find the NJ State Archives. I finally parked and asked a passerby where the facility was. He pointed to the large building about a football field away - "Right there." I fed the meter and went in to research.
At the Deats library in Flemington, I looked through the Prall card collection and Prall folders. My best find was the will of Benjamin Prall [brother to Cornelius Sr.] and the letter from the innkeeper with whom he had left the will. Benjamin had been on a trading trip, became ill and wrote his will.
That added three kids to the family group!