I certify the following to be a true copy of His Majesty's Letters Patent dated the twenty-second day of October 1948, passed under the Great Seal.

GEORGE THE SIXTH by the Grace of God of Great Britain Ireland and the British Dominions beyond the Seas King Defender of the Faith To all to whom these Presents shall come Greeting Whereas His late Majesty King George the Fifth by His Letters Patent dated the thirtieth day of November in the eighth year of His Reign did declare His Royal Pleasure that certain members of the Royal Family therein more particularly mentioned should have the style title or attribute of Royal Highness And Whereas We are desirous of defining and fixing the style and title by which the children of the marriage solemnised between Our Most dearly beloved Daughter Her Royal Highness Princess Elizabeth Alexandra Mary Duchess of Edinburgh and His Royal Highness Prince Philip Duke of Edinburgh shall be designated And Whereas for that purpose We deem it expedient that the aforesaid Letters Patent should be amended and extended la manner hereinafter declared Now Know Ye that in the exercise of Our Royal and undoubted prerogative and of our especial grace we do hereby declare Our Royal Will and Pleasure that the children of the
aforesaid marriage shall have and at all times hold and enjoy the style  title or attribute of Royal Highness and the titular dignity of Prince or Princess prefixed to their respective Christian names in addition to any other appellations and titles of honour which may belong to them hereafter And We do further declare Our Will and Pleasure that our Earl Marshal of England or his Deputy for the time being do cause these Our Letters or the Enrolment thereof to be recorded in our College of Arms to the end that Our Officers of Arms and all others may take due notice thereof In Witness Whereof We have caused these our Letters to be made Patent Witness Ourself at Westminster the twenty-second day of October in the twelfth year of Our Reign

By Warrant under the King's Sign Manual
NAPIER



25th October, 1948.
My dear Garter,

With this letter I am sending a certified true copy of Letters Patent granting the prefix of Royal Highness and Prince or Princess to the children of Princess Elisabeth by her marriage to Prince Philip. 
                                                                          
In the Letters Patent (the original is with The King) there is a direction to the Earl Marshal that he shall cause the Letters Patent to be recorded in the College of Arms and it is for that purpose that I am sending the copy.  Is this sufficient or do you require to have the original Patent? I shall be pleased if you can accept my certificate but if you cannot do so, we can arrange for the original to he produced.

Yours sincerely,



Sir Algar Howard, K.C.V.O., C.B., M.C.


WHITEHALL.
18th October, 1948.

Sir,

I am to signify to you The King's command that you prepare a Warrant for His Majesty's Signature, addressed to the Lord High Chancellor,  to cause Letters Patent to be passed under the Great Seal of the Realm, for the purpose of giving effect to His Majesty's pleasure that the style, title or attribute of "Royal Highness" with their titular dignity of a Prince or Princess as the case may be shall be granted to any sons or daughters who may be born to Her Royal Highness The Princess Elizabeth, Duchess of Edinburgh, and that such Warrant shall set forth the tenor and effect of such Letters Patent,  and shall contain all such clauses as are usual or requisite.

It will be observed that the Letters Patent will in effect constitute an amendment and extension of the Letters Patent of the 30th November, 1917, of which a copy was enclosed with Dadd's letter of the 12th Oct.

                                         I am, Sir, Your obedient Servant.

G. A. Newsom
For the Secretary of State.


The Clerk of the Crown in Chancery,
&c.,      &c.,      &c.