Final answer:
Police surgeon Thomas Bond showed that the five canonical murders were performed by the same hand by comparing the wounds and methods used in the murders.
Step-by-step explanation:
Police surgeon Thomas Bond showed that the five canonical murders were performed by the same hand by comparing the wounds and methods used in the murders. By analyzing the injuries sustained by the victims, Bond was able to identify similarities in the wounds and conclude that they were inflicted by the same person. This forensic analysis provided crucial evidence in the investigation of the murders.