As in the preparation of Navy Blue and Cleared for Action, the author has taken great pains to verify the main facts of the present story, so far as they are concerned with the incidents of the great struggle still in progress between the empires of the East and the West. He acknowledges most gratefully the assistance received from the office of the Secretary of the Navy, from ex-Secretary John D. Long, and from Commander W. H. H. Southerland, now commanding the U. S. Cruiser Cleveland, Commander Austin M. Knight, President of the Board on Naval Ordnance, and Chief Engineer Edward Farmer, retired.