Pension file R.7758 (John Oaks, Exeter and Bangor, Me.; widow Abigail), page 20: deposition of Henry Sewall, Sangerville, Me., 25 Aug 1843 (on the minister who married John and Abigail). Henry Sewall corroborates the standing of Rev. Ezekiel Emerson of Georgetown, Me., the minister who married John and Abigail; the witnesses include an 'Oakes' (first name unclear).
Image · dated 25 Aug 1843 · source: U.S. National Archives (public record), via Fold3.

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Keep in mind: Pension file R.7758, John Oaks of Exeter and Bangor, Maine (service from Harvard, Mass.; Certificate No. 9174), widow Abigail (Lambert). Fold3 record 25087424, NARA M804, 27 images. The file is a Confirmed record of John Oaks (died at Exeter 25 June 1842) and of his widow's rejected claim. That he is a son of Capt. Jonathan Oaks is Likely, not proved: the file never names a parent. All 27 pages are shown.