Hi My great Uncle Robert Alexander Walker was a cardiologist and lived in Milwaukee with his wife whose maiden name was Schultz. I am sorry I do not know her first name.But was told that her father owned Schultz Steel. One of my father's cousins told me that they had two daughters and that one was called Catherine. My Aunt and Uncle both told me that he had a son and daughter. He was born in Montreal, Quebec, Canada area in 1871 and died prior to his brother who was my grandfather who died in November 1944. If anyone can help I would really appreciate it. Thank you for taking the time to read this e mail. Linda Ottawa, Ontario. Canada