Found Marriage for Rosa Etta L. Beirnes to Archie W. Cornell on March 29, 1904 in Grand Blanc, Oakland, Michigan. -and-
1900 Census for Rosa E. Beirnes (along with her parents and brother George) in Holly Township, Oakland, Michigan - and -
1949 marriage of her daughter Zellma Lacy to George M. Fisher in Steuben, Indiana
None of which is reflected on your profile for Rosa... But I could not find a marriage to William Schultz. How did you come to believe that these two were married? Was it an obituary or some other source? Was there any other information that might make it easier to narrow down?