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 The Sorrows of Frederick, by Romulus Linney, Birmingham Repertory Theatre (1971 onwards), started 11^th March 1970 and click the button that will have appeared there.

If they have the exact same name, a search for production of The Sorrows of Frederick, by Romulus Linney, Birmingham Repertory Theatre (1971 onwards), started 11^th March 1970 will probably help.