Hostile attitude of Prussia.
--The Black Republicans tell the truth occasionally in reference to their foreign relations, and it will be seen by the Washington correspondence of the Philadelphia Inquirer that even despotic Prussia is getting as unfriendly as England and France:I learn that the Secretary of State is busily engaged in writing dispatches to Mr. N. B. Judd, our Minister to Berlin; that they will contain specific instructions in regard to the unmistakable, hostile attitude of Prussia, is manifested in the dispatch of the Prussian Government to Baron Geroit and that they will be sent out in the next steamer. The Administration regards that dispatch as fully committing Prussia to the same unfriendly course of policy towards us as has been chosen by England, Spain and France, although her course, whatever it may be cannot effect our interests in the slightest degree.