"Maine Vital Records, 1670-1921," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q21S-WYH5 : 28 November 2018), Isaiah Clark and Sarah E Nash, 10 Dec 1853; citing Lincoln, Maine, United States, multiple sources, Maine; F
"Maine Marriages, 1771-1907", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4FR-XY9 : 14 January 2020), Sarah E. Nash in entry for Isaiah Clark, 1853.
Maine State Archives; Cultural Building, 84 State House Station, Augusta, ME 04333-0084; 1892-1907 Vital Records; Roll #: 26
Maine State Archives; Cultural Building, 84 State House Station, Augusta, ME 04333-0084; 1892-1907 Vital Records; Roll #: 26