been the practice of the Department in such cases, to formally withdraw them."
As the act of July 27, 1866, the one before us, is in these respects exactly like that of the one before the court in that case, it must be held that here, as there, Congress provided for two separate matters; one the fixing of the general route, and the other the designation of the line of definite location; and an examination of the evidence shows that the map which *601 was filed on April 3, 1871, was simply one of general route, and therefore did not work a designation of the tracts of land to which the Southern Pacific's grant attached. As the map was filed within one month after the grant, it might bethe heavy red line traced thereon the general route of the line of railroad, as near as may be, from a point at or near Tehachapa Pass, by way of Los Angeles to the Texas Pacific Railroad at or near the Colorado River, adopted by the said Southern Pacific Railroad Company in pursuance of the power and authority granted to said company by the 23d section of the act of Congress of the United States, entitled `An act to incorporate the Texas Pacific Railroad Company, and to aid in the construction of its road, and for other purposes,' approved March 3, 1871, and in pursuance of the provisions of the act of July 27, 1866, referred to in said 23d section, and for the purpose of obtaining the