In 1953, Plimpton joined the influential literary journal The Paris Review, founded by Peter Matthiessen, Thomas H. Guinzburg, and Harold L. "Doc" Humes, becoming its first Editor in chief. This periodical has carried great weight in the literary world, but has never been financially strong; for its first half-century, it was allegedly largely financed by its publishers and by Plimpton. Two articles by Richard Cummings, "An American in Paris" (The American Conservative) and "The Fiction of the State" (Lobster), disclosed that the CIA provided funds for The Paris Review, using publisher Sadruddin Aga Khan's foundation as a conduit, and that Plimpton was an "agent of influence" for the CIA. Peter Matthiessen took the magazine over from Humes and ousted him as Editor, replacing him with Plimpton, using it as his cover for his CIA activities. Jean Stein became his co-editor. Plimpton was associated with the literary magazine in Paris, Merlin, which folded because the State Department withdrew its support. Future Poet Laureate Donald Hall, who had met Plimpton at Exeter, was Poetry Editor. One of the magazine's most notable discoveries was author and screenplay Writer Terry Southern, who was living in Paris at the time and formed a lifelong friendship with Plimpton, along with Writer Alexander Trocchi and Future classical and jazz pioneer David Amram.