I think the Nathaniel Kenyon in MI is someone else. I believe he was b. 21 Oct abt. 1818 in Arcadia NY, m. Julia Fairman in 1843, and d. 4 or 5 Jun 1899 in Plymouth MI. Although he's not listed in the 1935 "Am. Kenyons...", he would have an ID = 111343, the s/o Elisha Kenyon, b. ca. 1784 in RI. I haven't found a likely candidate for your Nathaniel in census records.