The most important company operating is the one known as the Ward Line, which conducts a weekly service between several Mexican ports, Havana and New York. This company has some very good boats, and does a large business between all of those ports. The Mallory Line, the Mexican-American Line and the Munson Line have regular service between Mexican ports, Galveston and New Orleans. There are also several companies that make regular trips between Vera Cruz, Tampico and European ports. On the Pacific coast the Kosmos Line, operated by the Hamburg American Company, have a regular service from Seattle down the west coast of the United States, Mexico, Central America and South America to Europe by the way of the Straits of Magellan. The Pacific Mail Steamship Company operate about three boats a month from San Francisco to Panama, where connections are made for New York and West Coast ports of South America. The American-Hawaiian Company have boats which sail between Hawaii and Salina Cruz. There are also, in addition to these mentioned, a number of coast lines on both the Pacific and Atlantic side, which do a considerable traffic between the various ports. The Canadian-Mexican Pacific Steamship Company recently began to operate boats between Victoria, British Columbia and Salina Cruz, and gives a monthly service between those ports. In order to develop and facilitate this coast traffic the Mexican government has spent a great deal of money in providing harbours and docks at a number of the smaller ports, in addition to the larger enterprises that have heretofore been described. Mexico has not a great number of navigable rivers. On the Pacific side the Mayo, the Yaqui, the Balsas, the Rio Grande de Santiago and one or two others are classed as navigable streams, but because of bars and other obstructions they can be used only by boats of comparatively light draft. On the Atlantic side, just below the Isthmus of Tehuantepec, is the Grigalva River, which is a broad and imposing stream. Large boats ply regularly up this stream to San Juan Bautista, a distance of about seventy-five miles. Small boats go up still farther, the boat traffic extending clear to the mountains. The Usumasinta River is an affluent of this stream, and is navigable for small boats even beyond the Guatemala border. The Coatzacoalcos River, which flows into the Gulf at the town of the same name, is quite an important stream, and furnishes an outlet to a considerable territory. The Papaloapan River, which flows into the Gulf of Mexico near Vera Cruz, has been dredged and made navigable for a considerable distance into the interior. It has proved a great benefit to many small towns and plantations there situated.