Dear Pamela, We don't have a sister for Jacob Pleasant Alford named Sarah but there could have been one. What was her birth date? He was born 1824 and married 1847, so he was too young to have a daughter who married in 1857. Do you know the birth date for Nancy Sluder?Jacob's mother was Nancy C. Hunter and his father John Alford died in 1844 but she lived until 1867, according to our records.We have no record of her having married again. Sorry not to be of more help.