The last name is also spelled McCormack. All we have are his initials. We know he moved to Chicago [with his wife] in 1882. We need full name and as much biography as we can find. We need your help with this. We're swamped with other things, and Rachael is too sick to undertake this.
We're not making real progress with this. But if one presumes that the McCormacks moved from Pittsburgh to Chicago, city directories point to George L. McCormack and his wife Charlotte.