SIR:— I have had the honor to receive from Lord Napier your very kind note of the 13th ultimo, with the medal struck in commemoration of the marriage of the Princess Royal with Prince Frederick William. Whilst in England I had upon one or two occasions the privilege of meeting and conversing with the Princess Royal, which caused me to form a very high estimate of the excellence of her character, and to feel a deep interest in her prosperity and happiness. May her destiny prove fortunate, and her married life be crowned by a kind Providence with all the blessings which it is the lot of humanity to enjoy. With my most respectful regards to the queen. I remain truly yours, JAMES BUCHANAN. When the President in June, 1860, learned that the Prince of Wales would visit Canada, he hastened to write to the queen, and to extend a national invitation to the Prince to come to Washington. The following are the letters which passed between the President and the queen: [THE PRESIDENT TO QUEEN VICTORIA.] WASHINGTON CITY, June 4, 1860. TO HER MAJESTY QUEEN VICTORIA:— I have learned from the public journals that the Prince of Wales is about to visit your Majesty’s North American dominions. Should it be the intention of His Royal Highness to extend his visit to the United States, I need not say how happy I shall be to give him a cordial welcome to Washington. You may be well assured that everywhere in this country he will be greeted by the American people in such a manner as cannot fail to prove gratifying to your Majesty. In this they will manifest their deep sense of your domestic virtues, as well as the conviction of your merits as a wise, patriotic, and constitutional sovereign. Your Majesty’s most obedient servant, JAMES BUCHANAN. [QUEEN VICTORIA TO THE PRESIDENT.] BUCKINGHAM PALACE, June 22, 1860. MY GOOD FRIEND:— I have been much gratified at the feelings which prompted you to write to me inviting the Prince of Wales to come to Washington. He intends to return from Canada through the United States, and it will give him great pleasure to have an opportunity of testifying to you in person that those feelings are fully reciprocated by him. He will thus be able at the same time to mark the respect which he entertains for the Chief Magistrate of a great and friendly state and kindred nation. The Prince will drop all royal state on leaving my dominions, and travel under the name of Lord Renfrew, as he has done when travelling on the continent of Europe. The Prince Consort wishes to be kindly remembered to you.