Superscriptions for Letters.
To a Duke.
A Duke first was made by the French Kings, when they had chased the Romans out of Gallia; bestowing the name of Dux, a little altered to the French Idiom, upon those to whom they gave the Principal Government over those Pro∣vinces which they had recovered: in process of time theyusurp∣ed the Inheritance of their Governments; and made their Fei∣feswhich before were revocable at the Princes pleasure, to be hereditary. So that at length their Titles came to be so much esteemed as to be thought the next in order to that of a King.
The Title which is most usually applied to a Duke, is that of Grace; and we address ourselves ••ohim by word of mouth, thus.
May it please your Grace.
If he be the Kings Son, or of the Royal blood, we write to him thus.
To the most Illustrious Prince Henry, &c.
To the most excellent Prince.
Or else,
To the most High and Noble.
EArls at the same time, and upon the same account, were created by the French King, only here seem'd the diffe∣rence to be between them; for the Dukes seemed to have the Military Power, and the Earls were only made to exercise the Civil Jurisdiction in the Towns where they were plac'd.