There are two dates for this marriage floating around the internet: 08 MAR 1873 I am using from the bio in the Midland County History The Dibeans show both, the old LDS family search IGI extracted just shows the 1874 date.

Living nextdoor to his father Benjamin's family. Name: Elisha Hewitt Event Type: Census Event Date: 1880 Event Place: Montrose, Genesee, Michigan, United States District: ED 81 Gender: Male Age: 28 Marital Status: Married Race: White Race (Original): W Occupation: Works In Shingle Mill Relationship to Head of Household: Self Relationship to Head of Household (Original): Self Birth Year (Estimated): 1852 Birthplace: Vermont, United States Father's Birthplace: Vermont, United States Mother's Birthplace: Vermont, United States Note: Sheet Letter: B Sheet Number: 330 Sheet Number and Letter: 330B Household ID: 7409526 Person Number: 0 Volume: 1 Affiliate Name: The U.S. National Archives and Records Administration (NARA) Affiliate Publication Number: T9 Affiliate Film Number: 0579 GS Film Number: 1254579 Digital Folder Number: 005161010 Image Number: 00668 Household Role Gender Age Birthplace Elisha Hewitt Self M 28 Vermont, United States Christa Hewitt Wife F 23 New York, United States Sarah Hewitt Daughter F 3 Michigan, United States Elisabeth Hewitt Daughter F 1 Michigan, United States Citing this Record: "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWSW-MRY : 10 August 2016), Elisha Hewitt, Montrose, Genesee, Michigan, United States; citing enumeration district ED 81, sheet 330B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0579; FHL microfilm 1,254,579.