Congress provided the legal equipment for the annihilation of the entire frontier between 1862 and 1871. The charter acts of the Northern Pacific, the Atlantic and Pacific, the Texas Pacific, and the Southern Pacific at once opened the way for some five new continental lines and closed the period of direct federal aid to railway construction. The Northern Pacific received its charter on the same day that the Union Pacific was given its double subsidy in 1864. It was authorized to join the waters of Lake Superior and Puget Sound, and was to receive a land grant of twenty sections per mile in the states and forty in the territories through which it should run. In the summer of 1866 a third continental route was provided for in the South along the line of the thirty-fifth parallel survey. This, the Atlantic and Pacific, was to build from Springfield, Missouri, by way of Albuquerque, New Mexico, to the Pacific, and to connect, near the eastern line of California, with the Southern Pacific, of California. It likewise was promised twenty sections of land in the states and forty in the territories. The Texas Pacific was chartered March 3, 1871, as the last of the land grant railways. It received the usual grant, which was applicable only west of Texas; within that state, between Texarkana and El Paso, it could receive no federal aid since in Texas there were no public lands. Its charter called for construction to San Diego, but the Southern Pacific, building across Arizona and New Mexico, headed it off at El Paso, and it got no farther. To these deliberate acts in aid of the Pacific railways, Congress added others in the form of local or state grants in the same years, so that by 1871 all that the companies could ask for the future was lenient interpretation of their contracts. For the first time the federal government had taken an active initiative in providing for the destruction of a frontier. Its resolution, in 1871, to treat no longer with the Indian tribes as independent nations is evidence of a realization of the approaching frontier change. The new Pacific railways began to build just as the Union Pacific was completed and opened to traffic. In the cases of all, the development was slow, since the investing public had little confidence in the existence of a business large enough to maintain four systems, or in the fertility of the semi-arid desert. The first period of construction of all these roads terminated in 1873, when panic brought transportation projects to an end, and forbade revival for a period of five years.