European-American Diplomacy.
--It is believed that Mr. Lincoln has not made an appointment to the continent of Europe, --except Mr. Marsh's and Mr. Sandford's,--where the Ministers can either understand a word that is said to them, or be understand a word that is said to them, or be understood, when they speak a word, beyond ‘"Oui,"’ ‘"Yah,"’ ‘"Si, "’ or ‘"Nein,"’