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Main subject of the episode - described as 'one of the best-selling novels of the Victorian age' published in 1885

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Mentioned as published in 1883, described as a tremendous hit that inspired Haggard to write King Solomon's Mines after a bet with his brother

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Mentioned as 'Hartley's great novel' - the setting Brandon Hall was based on Ryder Haggard's childhood home

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Mentioned as a sequel to King Solomon's Mines that Haggard wrote quickly after his first success

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Described as another bestseller by Haggard published in 1887, called 'another absolutely foundational text in our kind of popular imagination'

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Mentioned in comparison to King Solomon's Mines - Tolkien was described as 'a massive fan of Haggard' and similarities in quest structure noted

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Referenced when discussing the idea of blank spaces on maps and Africa as 'the heart of darkness'

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Mentioned as being influenced by the tradition established by She and King Solomon's Mines

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Mentioned in context of the League of Extraordinary Gentlemen, referencing 'Mina Harker from Dracula'

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Described as 'a comic book' featuring Alan Quartermain and other late 19th century literary heroes