I assume that you have this from the Corey Society web:
310. Rufus Corey1,35 was born on 31 May 1759 in East Greenwich, Kent Co, RI. He died on 3 July 1778 in Wyoming, Luzene Co, PA. There is a trace of Coreys that show a Rufus, jr., b-1801 in PA to Rufus Corey, Sr. (b-1775, Windham, CT, d-1-10-1849, Lennex Twp., Susquehanna Co., PA) and Rachel Olney (B-1780, d-6-10-1847 in PA). This line does not go back any farther than Rufus, Sr.
Rufus Corey and Amy were married. Amy1 was born about 1760. She died.