It appears probable that Martha Valentine who married 1856 in Coshocton Co.was the daughter of William Valentine and Polly Baker.From Hill's 1881 History of Coshocton County, Page 806:
"VALENTINE WILLIAM, Bethlehem township; farmer; son of Andrew Valentine; was born in 1806, in Bedford county, Pennsylvania. He was raised on the farm and has always followed that occupation. He was married to Miss Polly Baker, of Bedford county, Pennsylvania., who was born in 1803. They came to this county in 1830, and have since resided here. They became the parents of six children, viz : Jacob, Elizabeth, Martha, Margaret, Rachel and Hiram, all of whom are married except Rachel. Mrs. Valentine died in 1846, aged thirty-eight years. ... Mr. Valentine afterward married Miss Abigail Griffen, of Coshocton county, who was born in 1815. They are the parents of six children, viz: Daniel, Benjamin, Rebecca J., Steward, Margaret and Samuel, all of whom are married and living in this county."
The family, without Martha, was enumerated in Bedford Twp in 1850, Dwelling/Family 58/58. Note that Hiram Valentine of this family, age 9, is enumerated in the household of Samuel Drake (117/117).Could the Martha, age 19, in this Drake household be Martha Valentine?