The Sons of Dukes and Marquises, and the Eldest Sons of Earls, have, by courtesy, the titles of Lord and Right Honorable; and all the daughters have those of a Lady and Right Honorable.
The Younger Sons of Earls, and the Sons and Daughters of Viscounts and Barons, are styled Honorable.
Official Members of the State
A Member of His Majesty’s Most Honorable Privy Council—
1. Sir, or My Lord, Right Honorable Sir, or My Lord, as the case may require.
2. To the Right Honorable ——,[14] His Majesty’s Principal Secretary of State for Foreign Affairs.
Ambassadors and Governors—
1. Sir, or My Lord, as the case may be; May it please your Excellency.
2. To his Excellency the French (or other) Ambassador.
3. To his Excellency ——,[14] Lieutenant General and General Governor of that part of the United Kingdom called Ireland.