Except for Shakespeare the direct influence of the Elizabethans was small. A few of the tragedies were acted intermittently in the first half of the century, and a few comedies kept their places in the stock list much longer. Revivals, though not infrequent, were rarely permanent. Revampings sometimes resulted in an almost unconditional surrender to the French. Theobald in the first half of the century attempted a reversion to the Elizabethans without much success, and later a revival of interest in Massinger succeeded in restoring only his two comedies to the theatre. As sources of incentive for those writers who shunned French modes, Otway, Southerne, and Rowe took the places of the Elizabethans other than Shakespeare. The English tradition which these names represent had, as we have seen, already been much subject to French influence, though protected by the adherence of the theatre to old custom. Consequently, while the majority of eighteenth century tragedies retain some Elizabethan practices, there is not one of importance that is a thoroughgoing representative of the old methods and technic. French influence, on the contrary, had many representatives among the new plays. The success of "The Distrest Mother" led to a number of translations. In the first quarter of the century there were ten of Racine's plays and four of Corneille's; and of these fourteen, eight were acted, and several with success. Later on, Whitehead's "Roman Father" (1750), an adaptation of Corneille's "Horace," won a place in the stock list. But the leading factor in the French influence on English tragedy during the century was Voltaire. The long critical debate which he waged in behalf of the rules and against the barbarities of Shakespeare has its importance in English as well as French literary history. But while the English critics grew more and more eager as the century advanced to uphold the glory of Shakespeare and to denounce an atheist who denied this, or to proclaim their freedom from the narrowing rules which were French, yet the triumphs of Voltaire's plays upon the English stage continued unabated. Adaptations of no less than nine of his tragedies had appeared on the London stage before the English translation of his full works in 1779-80, and there were manifold borrowings from him in many other plays.[31] A number of the translations, Hill's "Zara" and "Merope," Miller's "Mahomet," and Murphy's "Orphan of China," made notable successes. From the production of "Brutus" to that of "Semiramis" in 1776 Voltaire may be said to have been the most popular and influential of the writers of tragedy for the English theatre.[32]