The Iron Horse
Brandon, a surveyor, dreams of building a railway to the west. He sets off with his son, Davy, to survey a route. They discover a new pass which will shave 200 miles off the expected distance, but they are set upon by a party of Cheyenne. One of them, a white renegade with only two fingers on his right hand, kills Brandon and scalps him. Davy is all alone now.
Starring George O’Brien, Madge Bellamy, Charles Edward Bull, Cyril Chadwick, Will Walling, Francis Powers, J. Farrell MacDonald, Jim Welch, George Waggner, Fred Kohler
Watch "The Iron Horse" on Amazon released in 1924. It's a history and western movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.