A Blind Bargain

A Blind Bargain was a 1922 American silent horror film starring Lon Chaney and Raymond McKee, released through Goldwyn Pictures. The film was directed by Wallace Worsley and is based on Barry Pains 1897 novel, The Octave of Claudius. The film, which features Wallace Beery in an unbilled cameo as an apeman, is now considered lost.

Robert Sandell Raymond McKee, despondent over his ill luck as a writer, and his mothers declining health, attacks and attempts to rob a theatergoer, Dr. Lamb Lon Chaney, a sinister, fanatical physician living in the suburbs of New York. Lamb takes the boy to his home, learns his story, and agrees to perform an operation on Mrs. Sandell Virginia True Boardman on one consideration that Robert shall at the end of eight days, deliver himself to the doctor to do with as he will, for experimental purposes. Frantic with worry over his dying mothers condition, Robert agrees.Mother and son take up their residence in the Lamb home, where Robert is closely watched, not only by the doctor, but by his wife Fontaine La Rue, and a grotesque hunchback Lon Chaney, in a dual role, whom Robert learns afterwards is the result of one of the doctors experiments. ........

Source: Wikipedia