two figures. The first was Foola Zoola, an old African sorcerer and chief of the Voodoo tribe who cursed Scrooge, seeking revenge for the destruction of his village and the taking of his tribe's lands by Scrooge decades earlier. Scrooge privately admitted to his nephews that he had used an army of "cutthroats" to get the tribe to abandon their lands, in order to establish a rubber plantation. The event was set in 1879 by Carl Barks, but it would later be retconned by Don Rosa to 1909 to better fit with Scrooge's later-established personal history in The Empire-Builder from Calisota. The second figure from Scrooge's past was Bombie the Zombie, the would-be assassin sent from Foola Zoola to enact the sorcerer's curse and revenge. He sought Scrooge for decades before reaching Duckburg, mistaking Donald for Scrooge. Barks, with a note of skepticism often found in his stories, explained the zombie as a living person who has never died but has somehow gotten under the influence of a sorcerer. Although some scenes of the story were intended as a parody of Bela Lugosi's White Zombie, the story is the first to not only focus on Scrooge's past but also touch on the darkest aspects of his personality. Later stories Trail of the Unicorn, first published in February 1950, introduced Scrooge's private zoo. One of his pilots had managed to photograph the last living unicorn which lived in the Indian part of the Himalayas. Scrooge offered a reward to competing cousins Donald Duck and Gladstone Gander for whoever captured the unicorn for Scrooge's collection. This was also the story that introduced Scrooge's private airplane. Barks would later establish Scrooge as an experienced aviator. Donald had previously been shown as a skilled aviator, as was Flintheart Glomgold in later stories. In comparison, Huey, Dewey, and Louie were depicted as only having taken flying lessons in the story Frozen Gold (published in January 1945). The Pixilated Parrot, first published in July 1950, introduced a precursor to Scrooge's money bin. In this story, Scrooge's central office building is said to contain "three cubic acres of money". Two burglars (one of which is referred to as Butch) who briefly appear during the story are considered to be the precursors of the Beagle Boys. Scrooge as a major character The Magic Hourglass, first published in September 1950, was arguably the first story to change the focus