Zane Grey 
The Mysterious Rider 

He came to the Belilounds ranch, no one knew from where; a man of middle age, gentle, kindly, but so terrible a gunfighter that they called him 'Hell Bent’ Wade. He played the part of fate in all their lives, and only when the inevitable tragedy came and the Mysterious Rider made the great sacrifice did they know – and out of that tragedy came the light of love.