Our friend Silvio Calabi gave us a heads up that the book he co-wrote called “Hemingway’s Guns: The Sporting Arms of Ernest Hemingway” was about to be published. Having seen some of the chapters in advance, we were excited about the new information revealed from the in-depth research. Silvio gave us permission to run a chapter titled “The Winchester Model 21 Shotguns,” which appears following the introduction below.