William Bayle Bernard, commonly known as Bayle Bernard, was an American-born playwright and drama critic who became well-known in London theatrical circles. Born in Boston, Massachusetts, he was the son of English comic actor John Bernard. The family moved to Britain in 1820, where Bernard initially worked as a clerk in an army accounts office before pursuing a career in drama. Bernard had a prolific career as a playwright, producing numerous original works throughout the nineteenth century. His plays include The Four Sisters and Casco Bay (1832), The Kentuckian (1833), The Nervous Man (1833), The Mummy (1833), Marie Ducange (1837), The Round of Wrong (1846), The Doge of Venice (1867), The Passing Cloud (1850), and A Storm in a Teacup (1854). He also demonstrated skill in adaptation, creating stage versions of literary works such as Washington Irving's Rip Van Winkle (1834) and Wilkie Collins's No Name (1863). Beyond his work for the stage, Bernard authored The Freebooter's Bride, a five-volume historical romance published in 1829. His contributions to both original drama and literary adaptation established him as a significant figure in nineteenth-century British theatre.