In offering to the Government and the public this little volume on Ocean Steam Navigation and the Ocean Post, I am conscious of my inability to present any new views on a subject that has engaged the attention of many of the most gifted statesmen and economists of this country and Europe. There is, however, no work, so far as I am informed, in any country, which treats of Marine Steam Navigation in its commercial, political, economic, social, and diplomatic bearings, or discusses so far the theory and practice of navigation as to develop the cost and difficulties attending high speed on the ocean, or the large expense incurred in a rapid, regular, and reliable transport of the foreign mails.