A former member of Flint's crew who is half insane after being marooned for three years on Treasure Island, having convinced another ship's crew that he was capable of finding Flint's treasure. Helps Jim by giving him the location of his homemade boat and kills two of the mutineers. After Dr. Livesey gives him what he most craves (cheese), Gunn reveals that he has found the treasure. In Spanish America he lets Silver escape and in England spends his share of the treasure (1,000 GBP) in 19 days, becoming a beggar until he becomes keeper at a lodge and a church singer "on Sundays and holy days".