According to the IGI at familysearch.org, Joseph A Cummings married Melissa A Page on 1 Dec 1861 in Atkinson, Piscataquis, Maine (extracted marriage record).
1850 census of Parkman, Piscataquis, Maine p189: Joseph A Comins, age 14, born in Maine, listed with parents, Sylvanus, 39 & Louisa B, 38 and siblings, Peter, 10 and Lucy Ann, 6.
1860 census of Sebec, Piscataquis, Maine p15: Joseph A Cummings, age 24, born in Maine, merchant, listed with him is Saml O Proctor, 30 & his wife, Betsy, 28.
Melissa A Page Cummings
1844–1924 (m. 1861)