Here's another thought about Elizabeth Herr Sprout. If her parents were from Mt. Joy, and the magistrates records say she and Joseph Sprout were both from Elizabethtown in 1814, then she must have been either living with a relative, or working for some family there. I'm guessing they were both over 21, because the record doesn't mention any parental consent. Perhaps that wasn't necessary at that time and place, although my wifes families have records of consent as early as 1735, but that was in Virginia. That would suggest they were both born about 1793. What Sprouts and Herrs were in the area at that time? The earliest census was 1790, but local tax records might help.