"Michigan, County Marriages, 1820-1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FCF4-YM7 : 4 November 2017), John Edward Howarth in entry for John Wesley Howarth and Alice Willettie Chapin Chapman, 29 Aug 1912, Plainwell, Allegan, Michigan, United States; citing reference ID CN 9239, various archives, Michigan; FHL microfilm 1,017,877.