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- [S2335] Lawrence Shaw Mayo, The Winthrop Family in America. Internet Archive. Digital images. (Massachusetts Historical Society, Boston, 1948), (https://www.archive.org: 2012), pp. 4, 5-6. accessed 7 Aug 2019.
- [S2337] Robert C. Winthrop, Some Account of the Early Generations of the Winthrop Family in Ireland. Internet Archive. Digital images. (Cambridge, Mass.: John Wilson and Son, 1883), (http://www.archive.org: 19 Oct 2012), pp. 7-12. accessed 8 Aug 2019.
- [S2339] Joseph James Muskett, Suffolk manorial families, being the county visitations and other pedigrees, . Hathi Trust Digital Library. Digital images. 3 vols. (privately printed Exeter, W. Pollard, 1900-1941), (https://catalog.hathitrust.org: 2010), 1: 25. accessed 9 Aug 2019.
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