Sarah Byers
The sister of David and Capt. William Byers, was born October 21, 1716 in Exeter,
Devonshire, England. Since David was born in 1721 in Ireland the family would have moved between those years. Sarah married Samuel Porter, born December 18, 1701 in Belfast, Shire of Down and Province of Ulster in Ireland. Available evidence would suggest they were married in Chester Co., Pennsylvania.
Samuel died at the age of 87 and Sarah died when 78. Both died in York Co., South Carolina and are buried in Beersheba cemetery with a single stone for both.
http://www.byersstl.com/tvb/Art/1-24.pdf