Mr. Ewing to Mr. Seward
Sir: I have the honor to acknowledge the receipt of your circular letter of the 29th March, relative to diplomatic uniform, and will in future conform thereto.
I take pleasure in announcing the complete evacuation by the Prussian troops of the duchy of Luxembourg; which will be henceforth under the exclusive sovereignty of its grand duke the King of Holland, subject to the conditions imposed by the late Congress of London, that it remain neutral territory, and exempt from sale or transfer.
The Prussian government has called upon the grand duke to destroy the fortress; the importance of which, I learn from Count Bismarck, has greatly
diminished since the introduction of long-range guns.
I. have the honor to be, with great respect, your obedient servant,
Hon. William. H. Seward, Secretary of State, Washington, D. C.