Link to Burials in St. Mary's Graveyard, Philadelphia

https://books.google.com/books?id=MaVJAAAAYAAJ&pg=PA261&dq=peter+scravendyke+ireland&hl=en&sa=X&ved=0ahUKEwjepZHi96zNAhWo7oMKHeumD_YQ6AEIJDAB#v=onepage&q=peter%20scravendyke%20ireland&f=false

On page 261 it states Mary, wife of Peter Scravendyke, Sr., died April 20, 1820; age, 52 years.
Peter Scravendyke, Sr., died June 20, 1836; age, 74 years.