A SERMON PREACHED AT THE PARISH CHURCH OF ST. ANDREW BY THE WARDROBE AND ST. ANNE, BLACKFRIARS, ON TUESDAY IN WHITSUN WEEK, JUNE 4, 1811. BEFORE THE SOCIETY FOR MISSIONS TO AFRICA AND THE EAST, INSTITUTED BY MEMBERS OF THE ESTABLISHED CHURCH, BEING THEIR ELEVENTH ANNIVERSARY. BY THE REV. MELVILLE HORNE, LATE CHAPLAIN TO THE COLONY OF SIERRA LEONE.