"W. S. Gilbert", The Cambridge History of English and American Literature in 18 Volumes (1907–21), Volume XIII, "The Victorian Age", Part One. VIII. Nineteenth-Century Drama, § 15, Bartleby.com, accessed 27 May 2009
Bond, Jessie. The Reminiscences of Jessie Bond, Chapter 4 (1930), reprinted at The Gilbert and Sullivan Archive, 15 November 2008, accessed 21 August 2012
Stone, David. Robert Cunningham (1892–93), Who Was Who in the D'Oyly Carte Opera Company, 4 September 2009, accessed 25 May 2017
Cole, Sarah. Broken Hearts, The Gilbert and Sullivan Archive, 23 December 2000, accessed 21 August 2012
Crowther, Andrew (2018 թ․ օգոստոսի 13). «The Carpet Quarrel Explained». The Gilbert and Sullivan Archive. Վերցված է 2021 թ․ հոկտեմբերի 10-ին.
Shepherd, Marc. "Introduction: Historical Context", The Grand Duke, p. vii, New York: Oakapple Press, 2009. Linked at The Gilbert and Sullivan Archive, accessed 7 July 2009.
Gilbert's Plays, The Gilbert and Sullivan Archive, accessed 21 August 2012
Walbrook, H. M. "The English Offenbach", Gilbert & Sullivan Opera: A History and a Comment, reprinted at The Gilbert and Sullivan Archive, 28 September 2003, accessed 27 May 2009