"Deutschland Heiraten, 1558-1929," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N81X-W9V : 11 February 2018), Clara Förster in entry for Heinrich Mohr and Elisabeth Thron, 27 Jan 1869; citing Norf, Rheinland, Preußen, Germany; FHL microfilm 997,698.