In the book's own words, not ours, with obvious scanning errors fixed. Families often supplied these stories to the publisher, so check key dates.
Born 1848
From The History of Warren County, Ohio (1882)
JOHN W. VAIL, farmer; P. O. Franklin; son of William B. and Mary J. Vail; was born in this township Nov. 5, 1848. He passed his youth and early manhood on his father’s farm, and received a common-school training. Oct. 10, 1872, he was married to Miss Agnes Marlatt, daughter of William and Hepsia Marlatt; Mrs. Vail was born in Lebanon April 8, 1852. Mi*. Vail is engaged in farming and rearing live stock; he devotes considerable time to buying and selling horses; he owns 118 acres of the old homestead, with a good residence and improvements. Politically, he adheres to the Republican principles and doctrines of his honored father.
As printed in The History of Warren County, Ohio (1882). See the original pages. Wording is the original; obvious scanning errors have been corrected, and a few may remain.
The printed record stops around 1882. We trace your line from there down to you, with every source cited.