The dignity, and benefit, of the priesthood; The Lawfulness of Marriage in the Clergy; The Hardships of Them, and their Families, in This Nation; and The Excellency of the Charity by which they are relieved, &c. Set forth in a sermon Preached before the sons of the Clergy, at their Anniversary Meeting, in the Cathedral-Church of St. Paul, December 8, 1720. By Joseph Trapp, M. A. Published at the Request of the Stewards for That Year.