The name for the Dewberry bar director Ryan Casey’s cocktail comes from “The Duplicity of Hargraves,” a 1902 O. Henry short story set in post–Civil War Washington, D.C., which details the ritual of prepping a proper mint julep. In the tale, O. Henry calls the drink “Nature’s sweet restorer.” Casey selected the drink’s flavors—hints of fennel, mint, and lemon—to complement spring afternoons in the South. “It’s light, bright, and refreshing,” he says. “Easy to enjoy.”