Which major publishing house's logo features a dolphin wrapped around an anchor, a symbol dating back to the 16th century?

Publishing houses and literary brands have some of the most recognizable logos in the creative world. These symbols not only represent the brand but often tell a deeper story about the publisher's history or philosophy. Test your knowledge of the publishing industry's visual identity with this trivia question about one of the most iconic logos in literature.

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Penguin Random House
HarperCollins
Doubleday
Aldus/Doubleday (now part of Penguin Random House)