Oliver Wendell Holmes, Jr., United States v. Southern Pacific Railroad Company…
“ What a railroad is to be indemnified for may be fixed as of the moment of the grant, but what it may elect when its right to indemnity is determined depends on the state of the lands selected at the moment of choice. Of course, the railroad is limited in choosing by the terms of the indemnity grant, but the so-called grant is rather to be described as a power. Ordinarily no color of title is gained until the power is exercised. ”
