Redsgirl4 on Family Tree Circles

I can get back to his birth in County Donegal, Ireland. No further history can be found as to parents or siblings, other than a sister by the name of Agnes or Nancy. Trying to get a copy of a book called the "House of Grimmett"", because in Chapter 17, it supposedly mentions Patrick McElwain and his wife, Mary Campbell. They lived out their lives in Lancaster County , Pa, until his death in 1832.
If anyone should have any further information, I would greatly appreciate it.
Lori McElwain Turner