Herbert decides to use this newfound possibility - the information he got from Robert - to blackmail the Herricks. He is unsuccessful, as Jasper calls on chief constable Sir Frederick Travers. The chief constable declares Robert's claims to the Herricks' estate as void and orders him to leave his jurisdiction. Robert leaves for London, but on his way he happens to come by the home of eager scientist Dr. Peter Drury. This scientist is involved in some questionable research, and is very eager to find a suitable subject to test his new experimental formula on - a formula for invisibility. Robert asks that the doctor try it on him, and he agrees, completely in the dark of the fact that Robert wants to use this to get his revenge on the Herricks. Robert forces Jasper to sign over their entire estate to him. He also finds time to help his saviour Herbert to win a game of darts at the local inn. Jasper secretly also agrees to give his daughter's hand in marriage to Robert - if he ever regains his visibility. Robert goes back to the scientists laboratory and witnesses how the doctor restores visibility to his dog Brutus, by giving him a blood transfusion. Robert breaks into the laboratory and knocks the doctor unconscious, before performing a blood transfusion on himself, using the doctor's blood. The transfusion results in the doctor's death, and to avoid capture, Robert sets the laboratory on fire and takes off just before the police arrive on the scene.