Hi jevison142! I'm also descended from William Evison and Ellen Wickham. Their son, William St. Thomas Evison, is my great grandfather. I live in London, Ontario, Canada.
I noticed that in your message that you said that Ellen's name was Mary Ellen. I found a document (see attached) that says that her name was Dorothy Ellen Wickham. So now I'm confused! Do you have any documentation showing her name as Mary Ellen?