States: Michigan: Ogemaw
After checking my files from when I was in West Branch to do research - I found a death record for a Mary Walters (didn't know who she was before now), who died 14 Feb 1913 in Rose City, born York state & her father was Mathias Peterson! She was 33y8m7d when she died.
I also found Mathias on the same censuis sheet as Ernest & Mary in the 1910. Other than that I know nothing about him. I do have more on her husband & children. If interested - contact me.