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October 1919 issue of The Thrill Book, $24,000 (£20,100) at Heritage.

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It was, in fact, the penultimate issue of the magazine in that form, and it seems that many issues are known only in very small numbers.

True high-grade examples of most may simply not exist, said the cataloguer’s notes, adding that Heritage had encountered only one other example of this issue.

A 15 cent ‘Semi-Monthly’ as the cover proclaims, it went on to sell at $24,000 (£20,100) in Dallas.

This ‘showcase’ sale focused on science-fiction and fantasy works from the collections of Jack and Joanie Kump.