I found a copy of the marriage record for William and Cordelia in the IGI file, located on http://familysearch.org. His name is listed as William Henry Cooper. The date of marriage is verified as January 1891, and Cordelia is listed as being born in Iowa.

William Harry Cooper's death certificate showed that he was age 60, 2months, and 25 days at his death on Oct. 14, 1918. He was born July 19, 1858, in New York. He was a hotel-keeper. No specifics are given for who William's parents were except that they were both born in England. He had been in CA for 30 years, and 8 years at his latest address. He was taken to the Oakland Crematory in Oakland, CA, and buried Oct. 17, 1918. The address of the undertaker is Soriusen Bros, 543 Castro St. Hayward, CA. He died of Influenza, with a contributing factor of Broncho Pneumonia of 48 hrs. duration. Delia Cooper of 475 Castro St. Hayward, CA signed the death certificate.