I am also researching James Lynas and Sarah Gowdy. They had a daughter, Margaret Lynas, baptized 2 Feb 1853, also at St. Anne's. Margaret Lynas married James McCaughan on 6 Oct 1871.
I have a digitized letter from James G. Lynas to my grandfather, dated May 15, 1915. In it he references all kinds of information about his children.