To William I 
President of the United States of America.
To His Majesty William I.
King of Prussia, &c. &c.
Great and Good Friend: I have received the letter which Your Majesty was pleased to address to me on the 16th. ultimo, announcing the birth of a Prince to your well beloved daughter-in-law, the wife of the Prince Royal of Prussia, the Princess Victoria Adelaide Maria Louisa Princess Royal of Great Britain and Ireland and Duchess of Saxony.
Page 57I participate in the satisfaction which this happy event has afforded to Your Majesty, and to Your Majesty's Royal Family, and offer my sincere congratulations upon the occasion.
May God have Your Majesty, always in His safe and holy keeping. Your Good Friend, ABRAHAM LINCOLN.
Washington, October 20th. 1864.
By the President,
WILLIAM H. SEWARD, Secretary of State.