"Montana, Marriages, 1889-1947," Henry Jackson Lutz in entry for Sylvester Williams and Demetta Andrews, 1911
groom's name: Sylvester Williams
groom's birth date: 1846
groom's birthplace: Sheffield Ma
groom's age: 65
bride's name: Demetta Andrews
bride's birth date: 1862
bride's birthplace: Colmer Il
bride's age: 49
marriage date: 16 May 1911
marriage place: Fergus, Montana
groom's father's name: Sylvester Williams
groom's mother's name: Jane E. Andrews
bride's father's name: Henry Jackson Lutz
bride's mother's name: Sarah Jane Caultion
groom's race:
groom's marital status:
groom's previous wife's name:
bride's race:
bride's marital status: Widowed
bride's previous husband's name:
indexing project (batch) number: M71102-1
system origin: Montana-EASy
source film number: 1035939

The name of the wife doesn't match. Shot in the dark here. Try looking at familysearch.org. Sometimes they have stuff that isn't on other sites.