I found a marriage date on that web site of 15 Sept. 1909, however, the place isn't listed.
I found the 1910 Census where Emil and Mary are living in Columbia, Washington, Oregon. I'd contact the Oregon State Archives, http://arcweb.sos.state.or.us/http://arcweb.sos.state.or.us/ and ask about a marriage license in 1909. They don't show that year under Washington Co.
Death certificates in 1954 can be found at the Oregon Health, http://public.health.oregon.gov/BirthDeathCertificates/Pages/index.aspxhttp://public.health.oregon.gov/BirthDeathCertificates/Pages/index.aspx . Death certificates contain a lot of great information (depending upon the informant). Ask them if you can get a copy for genealogy purposes. It might be less expensive.
I don't know where you'd find birth records in Eau Claire Co., Wisconsin. You might do a Google search for Eau Claire County Wisconsin 1878 Birth Records. Successful Searching!