I found the record for you which I'm attaching (two pages). The marriage date is 28 January 1845 in Nancy at 10 in the morning between:
Pierre Jaeger, a builder, age 29, born 13 November 1815 in Andelsbuch, district of Bregenz, state of Vorarlberg, Austria to Joseph Jaeger, who died 22 February 1929 in Andelsbuch, and Barbe Feverstein who was living in Andelsbuch and gave her written consent on 15 February 1844.
and
Anne Knecht, age 16, living with her parents, born 4 January 1829 in Nancy to Jean-Adam Knecht, a carpenter, and Catherine Salsman who both gave their consent to the marriage and were present at the wedding.
Hope that helps.
Cheers,
Soosi