The best source of a family tree (and I have a copy) is from Dr. Rodney Eatock Taylor (easily found through a Google search).
Timothy was one of 14 and his sister Henrietta Maria is my wifes ggrandmother. Rodney sent me an A3 familt rtreee some years ago and it shows at least another 5 children after Margaret Ethel. If you have any trouble, get back to me