Matcham's most successful period was between 1892 and 1912 when he worked extensively for Moss Empires, a theatrical company headed by Edward Moss and run by Oswald Stoll. Under them, he completed 21 theatres, most of which were in the provinces. Also during this period, although not with Moss Empires, he completed the designs for the Tower Ballroom at Blackpool Tower, Grand Theatre, Blackpool and the Theatre Royal, Norwich all in 1894; and the County Arcade, Leeds, in 1900. The author Iain Mackintosh, writing for the "Dictionary of National Biography" in 1993, describes Matcham's theatre interiors to be superior when compared to the building's external designs. Matcham's use of cantilevers for the galleries allowed him to discontinue the use of columns, which would otherwise obstruct the audience's view of the stage. The auditorium decorations were often mixed with Tudor strap-work, Louis XIV detail, Anglo-Indian motifs, naval and military insignia, rococo panels, classical statuary, and baroque columns.