My Great Grandfather Hugh McCormick was born in 1884, so yes he would have not been in the census.
My Aunt Helen did discuss Robert's wife Mary only to say she didn't know her last name and that no one knew much about her. This tells me she was discussed in my Grandmother's family.
I gleaned Robert and the children did not take her passing very well and they missed her and to discuss her touched a nerve.
Thank you for the great information. I'll get on these pictures and see what I can come up with.