Cloud County Cemetery Book, Volume 4, page 150
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The following information was sent by Craig English (#47277006):
From: History of Madison County, Iowa and its People, Herman A. Mueller. (Excerpt from James R Davis, son)
James R. Davis, who is living retired in Winterset, has been a prominent official of this county and is also entitled to honor as a veteran of the Civil war. He was born in Washington county, Pennsylvania, on the 17th of September, 1832, a son of William and Elizabeth (Rollstin) Davis, also natives of that county. The father was born on the 26th of March, 1808, and the mother on the 5th of December, 1814, and their marriage was celebrated in 1830. William Davis worked upon the "pike" in Washington county, Pennsylvania, for a time but in 1841 removed with his family to Guernsey county, Ohio, where he farmed until 1857, when he came to Winterset, Iowa, arriving here on the 2d of May. He made the journey with ox teams and settled in Union township, this county, where he became the owner of three hundred and sixty acres of land. He remained there until 1870, when he went to Kansas, in which state he passed away in 1878. He survived his wife for about twelve years, as she died on the 4th of May, 1866. He was a member of the United Presbyterian church and was highly esteemed in his community.

From Familysearch.org
William Davis marriage to Naomi McClelland on December 25, 1866 in Madison County, Iowa.

Winterset Madisonian
Thursday, April 3, 1879
Page 2, Column 3
Mr. William Davis who was for many years a resident of this county, died at his late home in Cloud county, Kansas, on March 23, 1879. Had he lived three days longer, he would have been seventy years old.