Traveling north from San Francisco, the trio detour through what later became Redwood National Park where D.J. has endowed a grove of Redwood trees, entitled "Mulrooney Grove". There they encounter a gnome called Jasper (Tom Lowell), who has "a terrible problem". They also are introduced to Jasper's 943-year-old grandfather Knobby (also played by Brennan) who, like D.J., is passionate and short-tempered. Jasper's "terrible problem" is that Knobby is suffering from a sickness called "fading", or becoming semi-transparent. D.J. diagnoses this as Knobby losing the will to live. The reason for this "fading" is that Knobby fears that he and Jasper are the last two of their Gnome kind, and Knobby wants Jasper to find a bride before Knobby dies. Knobby harbors immense hatred for humans because of the human's logging damage to the forests and the livelihood of gnomes. D.J. Mulrooney is startled when Knobby exclaims that the worst loggers were "Mulrooney's Marauders", but the gnomes agree to go along with the trio and seek other gnomes. As they leave together, the children rename the Rolls-Royce "the Gnome-Mobile".