[Martyn Green as Ko-Ko in "The Mikado".]

[Sydney Granville as Pooh-Bah in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[Martyn Green as Ko-Ko in "The Mikado".]

[George Thorne as Ko-Ko and Fred Billington as Pooh-Bah.]

[Marjorie Eyre as the title role in "Iolanthe".]

[Martyn Green as Ko-Ko and Evelyn Gardiner as Katisha in "The Mikado".]

[Theater stills of Martyn Green as Ko-Ko in "The Mikado".]

[Portraits of cast members in various D'Oyly Carte Opera Companys productions of Gilbert & Sullivan.]