'Buffalo Bill's Spy Trailer; Or, The Stranger in Camp' is a Western novel written by Prentiss Ingraham. It is a fictionalized account featuring the famous real-life Western-era figure, Buffalo Bill. The story begins with a horseman drawing rein one morning upon the brink of the Grand Cañon of the Colorado. It is a mighty abyss, too vast for the eye to take in its grand immensity; a mighty mountain rent asunder and forming a chasm which is a valley of grandeur and beauty, through which flows the Colorado Grande. Ranges of mountains tower to cloudland on all sides with cliffs of scarlet, blue, violet, yes, all hues of the rainbow; crystal streams flowing merrily along; verdant meadows, vales and hills, with massive forests everywheresuch was the sight that met the admiring gaze of the horseman as he sat there in his saddle, his horse looking down into the canyon.