The Westport Estate Papers document John Dalton of Rahara, barony of Athlone, county Roscommon in the mid 18th century. He was a nephew of Dennis Kelly of Lisduff, county Galway, the father in law of Peter Kelly Browne of Westport. In one document John Dalton refers to his purchase of the estate of Richard Bellew. At the time of Griffith's Valuation a Michael Dalton held land in the parish of Kilcooley, barony of Roscommon.
- Westport Estate Papers, Collection List 78; National Library of Ireland
- D’Alton Papers, include 9 letters from John D’Alton to his wife Kate, mainly describing his visits to Cos Roscommon & Westmeath, 1821-1838 & 3 letters to John D’Alton from his mother Eliza with some refs to Cos Roscommon & Westmeath, 1806, 1812-1813. MS 20,945 & 20,949; National Library of Ireland
- Roscommon estates family deeds, mainly relating to Dalton, Dillon & Hanly families, 1650-1700. MS 24,597(1-2); National Library of Ireland