On the northern wall of the crypt in the basement of St. Michael's Cathedral is a vault dedicated to the Elmsley and King families. The crypt is not open to the public.
Charlotte Elmsley was the wife of Hon. John Elmsley, a prominent well-connected Anglican. He announced to Bishop MacDonnell in 1833 his unexpected conversion to Catholicism via a heartfelt letter which has been preserved. Read it in full here along with more on the early history of the Archdiocese.