Pauline Pfeiffer

Pauline Marie Pfeiffer (July 22, 1895 – October 1, 1951) was an American journalist, and the second wife of the writer Ernest Hemingway. She first had an affair with Hemingway in Paris in 1926, when he was married to Hadley Richardson. After Hemingway's 1927 divorce, he married Pfeiffer. They had two sons, Patrick and Gregory. When the Spanish Civil War began, Pfeiffer's Catholicism caused her to support the Nationalists, while Hemingway supported the Republicans. By 1937, Hemingway was having an affair with Martha Gellhorn, whom he married in 1940 after his second divorce. Pfeiffer died suddenly in 1951, of a cause later tentatively identified as a brain tumor.

In "Cayos in the Stream", a fictionalized Hemingway narrates the story in second-person. In the opening paragraphs, he reflects on his break with Pauline and his joining with Martha.