In 1937, Max Eastman and Ernest Hemingway found themselves together in Max Perkins’ office at Scribner’s. On Perkins’ desk was Eastman’s Art and the Life of Action, which contained an essay critical of Hemingway. They began to argue. Hemingway bared his chest. Eastman bared his. Hemingway slapped him.

What happened next is unclear. “The trouble with these literary bouts,” opined the New York Times, “is that there is never an official referee on hand. Both sides can claim a decision and a foul at the same time, and usually do.”

But in 1947 the House of Books catalog offered for sale a damaged copy of Art and the Life of Action. On page 95, it said, was a spot caused by contact “with Mr. Eastman’s nose when Mr. Hemingway struck him with it in a gesture of disapproval.” The spot was witnessed by Maxwell Perkins.