Ernest Hemingway? Apocryphal?

Question for Quote Investigator: Did Ernest Hemingway drink heavily while he was writing? How many hours did he spend working each day? Can you find an interview containing quotations that illuminate his drinking and writing habits?
Reply from Quote Investigator: Shortly before Hemingway died in 1961, he participated in an interview conducted by Edward Stafford and his wife. The result appeared in the “Writer’s Digest” in 1964. Emphasis added to excerpts:1
My wife needled him. “Is it true,” she asked, “that you take a pitcher of martinis up into the tower every morning when you go up to write?”
“Jeezus Christ!” Papa was incredulous. “Have you ever heard of anyone who drank while he worked? You’re thinking of Faulkner. He does sometimes—and I can tell right in the middle of a page when he’s had his first one. Besides,” he added, “who in hell would mix more than one martini at a time, anyway?”
Thus, Hemingway denied that alcohol was his muse. A separate QI article explored a germane saying which has often been attributed to Hemingway: “Write drunk, edit sober”. QI found no substantive support for ascribing this remark to the famous author.
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