Ut WHO UIIllcU OUVttJS H3 1UU1 JliAUtJI-lency,” we may. readily pardon their natural blunder; but,when a.Cabinet officer, whose business-it is to know all. about official etiquette uses this form of -speech, as P.M.-Gen. Key did yesterday,- the error deserves some small attention. The President .is not “ His Excellency” at all, either by law or proper courtesy.. His rank and title during his terin of office is legally and properly President, and nothing' else, and. to call him: by the title M Your Excellency”:is as absurd as tocall him “ Sire** or ‘‘-Your Majesty.” It is true that Congress might have conferred the title “ Excellency” upon the President, with a good deal more of propriety than it could have made him a “Majesty,” but as Congress has not conferred either title upon him it is as absurd to use the one as the other.Mr. Sumner, who was fastidiouslyAvnnf ^n fill YnO+'fnw aIIIrtt nl nf i