A calendar of microfilmed original letters in the archives of the postulator general of the Congregation of the Mission, the Vincentians, in Paris. As the representative of the Congregation to the Holy See, the postulator received varied requests from provinces, as well as the main body of letters and spiritual writings of Felix De Andreis, pioneer Vincentian superior in the United States (1817-1820). Series E consists of three rolls, presenting the twenty volumes of letters and documents. Volume One has a large collection of letters from Joseph Rosati and Bishop Louis Dubourg.