Richard Walsh/Catherine Power

So I have a two part questions. Richard Walsh, my great grandfather was born i believe June 8, 1871. He married Catherine October 1,1898. He died around the time of my grandfather's born in 1899. I am trying to find out when. The second part of the question is about Catherine. She went on to remarry & have two kids. She married John Norris in 1903, had a son James in 1903 & daughter Mary in 1911. My grandfather emigrated to America via Canada in 1927. My dad, also John never knew his grandparents names or that his father had two half siblings. Never heard stories about his grandmother. My dad died in 1995. He just thought his father was an orphan. So I would really love to know what happened.