Which famous 20th century author's endorsement of Parker Pens included the line 'It's the pen I use more than any other' and helped establish the brand as a prestigious writing instrument?

Throughout literary history, famous authors have occasionally lent their names and reputations to endorse products, creating fascinating connections between literature and commerce. These endorsements sometimes reflected the author's genuine interests or needs, while others were purely commercial arrangements. This trivia question explores a notable author-brand partnership that significantly boosted a product's reputation and sales.

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Ernest Hemingway
Virginia Woolf
F. Scott Fitzgerald
James Joyce