Roger Sumner m. "abt. 1656 prob. at Lancaster" Mary Joslin. "He lived at Lancaster for seventeen years until that town was abandoned in March, 1676, and then at Milton."
[Note: Ferris cites NEHGR, p. 8:128e. Based on what is found there, the assumed location appears based on the residence of the wife ("The name of Thomas Joslin is found there [Lancaster] in 1654"), since Roger was "admitted into the Dorchester Church about 1656 but was dismissed 26 Aug 1660" to Lancaster.]