Where is the marriage record for Eliza Jane (Horton) Chapman and John Rounsavelle/Rounsaville between 1872 and 1880?

Eliza Jane Horton born 28 Dec 1827 in Hartford, CT was the daughter of Henry Horton & Pamelia Chapman. Eliza J Rounsaville died 12 Dec 1913 in Montague, Franklin, Massachusetts.

She married first John W. Chapman (1823-1871) on 20 Aug 1851 in Springfield, MA.

In 1880 she is listed at 159 Chelsea Street Boston, MA with John Roundsville. John Rounsavelle was born about 1821 in Baltimore, Maryland and died 17 Aug 1888 Montague, Massachusetts

Seeking marriage record for Eliza and John Rounsavelle