Seward on the crisis.
--Mr. Seward has sent a letter to the new minister at Paris, W. L. Dayton, directing him emphatically to declare to the French Government that there is not now, nor has there been, nor will there be, any or the least idea existing in this Government of suffering a dissolution of the Union to take place in any way whatever; and that no member of the Administration entertains any other opinion than that there shall be but one Government in this country.