The Secret of the Unicorn Rackham's looks and costumes were also inspired by the character, Lerouge, who appears in C. S. Forester's novel, "The Captain from Connecticut", and by the 17th-century French buccaneer Daniel Montbars. The name of Marlinspike Hall— in French—was based upon the name of the real Belgian town, Sart-Moulin. The actual design of the building was based upon the Château de Cheverny, albeit with the two outer wings removed. In introducing Francis Haddock to the story, Hergé made Captain Haddock the only character in the series (except Jolyon Wagg, introduced later) to have a family and an ancestry. "The Secret of the
Tintin and the Lake of Sharks with laughing gas and take the children away. Tintin and Haddock pursue them but fail to rescue Niko and Nouchka. The criminals leave behind a message on a tape player from their leader, "King Shark", who tells the heroes (with a voice which is startingly familiar to Tintin) that they will get the children back in return for Calculus' invention. Tintin himself is to do the exchange and is not to call the police. Tintin, Haddock, Calculus and the detectives search the house for bugs, and Tintin discovers a secret passage that leads to Madame Black's walkie-talkie hidden in the