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European Etiquette in Addressing Letters: Royal

Letters to members of the Royal Family should begin, "Sir," or "Madam," and end, "I have the honor to remain, sir (or madam), your Royal Highness's most dutiful and most obedient servant." 66 A letter to a Duke or Duchess, not members of the Royal Family, should be addressed, "To His Grace, the Duke of ;" "To Her Grace, the Duchess or 一." It should begin with "My Lord Duke;" but a duchess, in common with all other ladies, from the Queen downwards, is addressed as "Madam." In writing to a marquis, address the letter, "To the Most Hon., the Marquis of -;" and to a marchioness, "To the Most Hon., the Marchioness of ." Begin, "My Lord Marquis."