The sinking of the British passenger steamer Falaba by a German submarine on March 28th, through which Leon C. Thrasher, an American citizen, was drowned; the attack on April 28th, on the American vessel Cushing by a German aeroplane; the torpedoing on May 1st of the American vessel Gulflight by a German submarine, as a result of which two or more American citizens met their death; and, finally, the torpedoing and sinking of the steamship Lusitania, constitute a series of events which the Government of the United States has observed with growing concern, distress, and amazement. Recalling the humane and enlightened attitude hitherto assumed by the Imperial German Government in matters of international right, and particularly with regard to the freedom of the seas; having learned to recognize the German views and the German influence in the field of international obligation as always engaged upon the side of justice and humanity; and having understood the instructions of the Imperial German Government to its naval commanders to be upon the same plane of human action prescribed by the naval codes of the other nations, the Government of the United States was loath to believe--it cannot now bring itself to believe--that these acts, so absolutely contrary to the rules, the practices, and the spirit of modern warfare, could have the countenance, or sanction of that great government. It feels it to be its duty, therefore, to address the Imperial German Government concerning them with the utmost frankness and in the earnest hope that it is not mistaken in expecting action on the part of the Imperial German Government, which will correct the unfortunate impressions which have been created, and vindicate once more the position of that government with regard to the sacred freedom of the seas.