Character
John Horner
- Average age: 35 years
- Wikipedia: John Horner (link not verified)
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Jan 1892: 'The Adventure of the Blue Carbuncle' -
23 Dec 1968: 'The Blue Carbuncle' -
05 Jun 1984: 'The Blue Carbuncle' -
02 Jan 1991: 'The Adventure of the Blue Carbuncle'