When Samuel Phelps revived John Webster's tragedy, The Duchess of Malfi, at Sadler's Wells on November 20, 1850, its success was immediate. Based on an adaptation by Richard Hengist (Henry) Horne and presenting Isabella Glyn as the Duchess, the revival inspired numerous performances in subsequent years. The British performances varied little from the original revival, Miss Glyn's remarkable success as the Duchess having created an almost instant tradition that was seldom tampered with to any extent. However, in the United States there was less respect for what Horne-Phelps-Glyn had wrought, and the first performance of Webster's tragedy included innovations that were to have a lasting influence upon American productions. These changes are indicated in detail in the promptbook of James Stark, the actor-manager who introduced the Duchess of Malfi to the United States at the American Theatre in San Francisco on August 22, 1857. Stark's book is based upon Horne, consisting in fact of pages from the printed edition pasted in traditional fashion into a notebook, with the page opposite the printed text offering space for longhand revisions, notations of stage business, calls, and so forth. With the exception of the fifth act Stark makes few major changes in Horne's dialogue, merely shortening some speeches and noting a few longer passages which may be cut if necessary. Home's Act II, scene iii, where Ferdinand and the Cardinal discuss the Duchess' looseness, “Can be omitted,” Stark notes, suggesting that American spectators may have been even more prudish than their London cousins. The last act, on the other hand, has been completely revised. Although it retains most of Home's dialogue, it greatly simplifies his structure—a significant change, as Home's handling of the fifth act had not always satisfied even his admirers.