I have had a wonderful time on Record Search at http://familysearchlabs.org/ searching for the births marriages and deaths in Michigan, where the George Watson family (my great grandparents) lived for 20 years. Here is what I found:

Groom name: George A Watson Groom age: 31 years
Groom birth year: 1871 Groom birth place: Canada
Bride name: Carrie Schuster Bride age: 25 years
Bride birth year: 1877 Bride birth place: Ohio Marriage type:
Marriage date: 09 Jun 1902 Marriage place: Sault Ste Marie, Chippewa, Michigan
Father of groom name: Geo Watson
Mother of groom name: Agnes J Welsh
Father of bride name: Max Schuster
Mother of bride name: Catherine Martin
Marital status: Groom previous wife name: Bride marital status:
Bride previous husband name: Additional relatives: Film number: 2342521
Frame number: Digital GS number: 4208661 Image number: 544
Reference number: v 1 p 512 rn 102 Collection: Michigan Marriages 1868-1925

This gives a definitive answer to the names of Carrie's parents and evidence that she was born in Ohio, (as the censuses say) and not born in Wuertemburg, Germany (as reported elsewhere). It also supports her birth as being in 1877 and not 1872 as reported in the 1911 census.

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Groom name: Arthur Sheffield Groom age: 25 years
Groom birth year: 1869 Groom birth place: Canada
Bride name: Margaret A. Watson Bride age: 18 years
Bride birth year: 1876 Bride birth place: Canada
Marriage date: 24 Oct 1894 Marriage place: Detour, Chippewa, Michigan
Father of groom name: Joseph Sheffield
Mother of groom name: Emily Wallace
Father of bride name: George Watson
Mother of bride name: Jane Welsh
Marital status: Groom previous wife name: Bride marital status:
Bride previous husband name: Additional relatives: Film number: 2342498
Frame number: Digital GS number: 4207821 Image number: 253
Reference number: v 1 p 10 rn 111 Collection: Michigan Marriages 1868-1925

This adds the names of Arthur's parents!

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Groom name: Frank Steele Groom age: 21 years
Groom birth year: 1870 Groom birth place: Wisconsin
Bride name: Mary E. Watson Bride age: 18 years
Bride birth year: 1873 Bride birth place: Canada
Marriage date: 16 Jul 1891 Marriage place: Sault Ste Marie, Chippewa, Michigan
Father of groom name: James Steele Mother of groom name: Rosa Griffen
Father of bride name: George Watson Mother of bride name: Jane Watson
Marital status: Groom previous wife name: Bride marital status:
Bride previous husband name: Additional relatives: Film number: 2342490
Frame number: Digital GS number: 4208239 Image number: 361
Reference number: v 1 p 388 rn 67 Collection: Michigan Marriages 1868-1925

This gives Franks parents' names, which I didn't have before. I still can't find his parents in the census.