 While previous animal characters in art and fiction were often given some human features, such as clothing and speech, Swinnerton went a step further with Mr. Jack by giving him an essentially human body below his tiger head, complete with hands rather than paws and an upright stance.As such, comics historian Don Markstein wrote that he was probably "the first realized funny animal", a character type that would soon become very well established in comics and other media.Jack's rakish ways made him a target of protests that he was a bad example for children, and after 1904 his strip was moved to the sports section, seen as a more adult and male area of the paper.