of the adjoining odd sections within forty miles on each side, until the definite location is made... . The general route may be considered as fixed when its general course and direction are determined after an actual examination of the country or from a knowledge of it, and is designated by a line on a map showing the general features of the adjacent country and the places through or by which it will pass. The officers of the Land Department are expected to exercise supervision over the matter so as to require good faith on the part of the company in designating the general route, and not to accept an arbitrary and capricious selection of the line irrespective of the character of the country through which the roadis to be constructed. When the general route of the road is thus fixed in good faith, and information thereof given to the Land Department by filing the map thereof with the Commissioner of the General Land Office, or the Secretary of the Interior, the law withdraws from sale or preëmption the odd sections to the extent of forty miles on each side. The object of the law in this particular is plain; it is to preserve the land for the company to which, in aid of the construction of the road, it is granted. Although the act does not require the officers of the Land Department to give notice to the local land officers of the withdrawal of the odd sections from sale or preëmption, it has