Go back further to be certain that Daniel is Mary’s son. Looking at the census I was very confused and amused that my great grandparents had three children, Mary Kate, Michael, and Mary. It seemed strange to name two daughters Mary. After doing some research, I discovered that Mary Kate and Michael were my great grandfather’s children with his first wife who had died, and the second Mary was the daughter of his second wife. There is no indication anywhere that my great grandfather ever adopted his second wife’s daughter, she is just listed as daughter on the 1901 and 1911 census. People died so young at this time, it’s worth researching.