As regards the lines that we now have, they are among the noblest in the world. For aggregate comfort, convenience, safety, speed, and cheapness, they are not equalled by the most famous British lines. More luxurious tables, more neatness, cleanliness, and roominess, more general comforts than have always been characteristic of our Havre, Liverpool, and California lines, can not be found in the world. The only objection to them is, that the service is not sufficient; that the trips are not frequent enough; and that the companies are not enabled to sustain a larger steam marine which would proportionally cheapen the service, and accommodate more persons and a much larger class of interests. Our experiences of the benefits of existing lines, limited as those lines are, present an unanswerable argument for the desirableness and necessity of a liberal steam postal system, and a large and judicious extension of the present service. (_See views of Senate Committee, 1852, Paper E._) SECTION III. THE CAPABILITIES OF OCEAN STEAM. THE COMMERCIAL CAPABILITIES OF OCEAN STEAM: STEAM MAILS ARRIVE AND DEPART AT ABSOLUTELY FIXED PERIODS: UNCERTAINTY IS HAZARDOUS AND COSTLY: SUBSIDIZED STEAMERS GIVE A NECESSARILY HIGH SPEED TO THE MAILS: MONEY CAN NOT AFFORD TO LIE UPON THE OCEAN FOR WEEKS: COMPARED WITH SAIL: STEAMERS TRANSPORT CERTAIN CLASSES OF FREIGHT: THE HAVRE AND THE CUNARD LINES: THE CUNARD PROPELLERS: STEAMERS CAN AFFORD TO TRANSPORT EXPRESS PACKAGES AND GOODS: GOODS TAKEN ONLY TO FILL UP: WHY PROPELLERS ARE CHEAPER IN SOME CASES: STEAM IN SOME CASES CHEAPER THAN THE WIND: AN ESTIMATE: THE PROPELLER FOR COASTING: STEAM ON ITS OWN RECEIPTS HAS NOT SUCCEEDED ON THE OCEAN: MARINE AND FLUVIAL NAVIGATION COMPARED: MOST FREIGHTS NOT TRANSPORTABLE BY STEAM ON ANY CONDITIONS: AUXILIARY FREIGHTING AND EMIGRANT PROPELLERS: LAWS OF TRANSPORT: RAPID MAILS AND LEISURE TRANSPORT OF FREIGHT THE LAW OF NATURE: THE PRICE OF COALS RAPIDLY INCREASING: ANTICIPATED IMPROVEMENTS AND CHEAPENING IN MARINE PROPULSION NOT REALIZED. Believing that no further arguments or facts are necessary to show that a rapid steam mail marine is desirable and essential to the successful government of the country, to our foreign commerce, and to the growth of individual interests and a general prosperity of the people, I shall now make some few inquiries concerning the Commercial Capabilities of steam, as the most effective agent for the rapid transit of the ocean, and the most expensive agent for the transport of goods. After this, it will be necessary to examine into the Cost of Steam, as a subject closely allied to its general capabilities.