Source: "Michigan Marriages, 1868-1925," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:N3NJ-ZPJ : accessed 3 April 2016), John Watt and Anna Smith, 14 Feb 1888; citing Marquette, Marquette, Michigan, item 2 p 420 rn 37, Department of Vital Records, Lansing; FHL microfilm 2,342,483.
Family Search has a record group of Michigan Marriages, 1868-1925 that has been a wonderful resource for my Michigan ancestors. My latest find is the marriage of my great grand uncle, John Watt and his wife, Annie Smith.
John Watt, the son of John Watt and Jane Wilson, married Anna Smith, the daughter of Sebastian Smith on 14th of February, 1888. They were married in Marquette, Michigan. John Watt was born in Scotland and Anna Smith was born in Michigan. John's occupation was listed as Engineer.
The witnesses were Thomas Lumpton and B?lla McGee. John's brother, David, married a Katherine McGee, who had a sister, Isabella. I wonder if that is her as a witness?
If you are looking for Michigan marriage records be sure to look at this resource.