Which famous 19th-century author was the first to legally trademark their signature and distinctive white suit as part of their author brand identity?

The publishing industry has seen many famous authors develop their own unique 'brands' that extend far beyond their books. From distinctive signatures to iconic author photos, visual elements, and even publishing imprints, successful authors have mastered the art of personal branding. This trivia tests your knowledge about famous authors who transformed their names into powerful literary brands that shaped their marketing and readership.

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Mark Twain
Charles Dickens
Edgar Allan Poe
Oscar Wilde