Thanks for helping improve the accuracy of the site. We’ve noted what item you were on; please now visit the web page of the duplicate of production of Henry IV, by Luigi Pirandello, Her Majesty’s Theatre, Haymarket, London (now His Majesty’s Theatre, Haymarket, London), 20^th February – May 1974 and click the button that will have appeared there.

If they have the exact same name, a search for production of Henry IV, by Luigi Pirandello, Her Majesty’s Theatre, Haymarket, London (now His Majesty’s Theatre, Haymarket, London), 20^th February – May 1974 will probably help.