Rachel Cowgill is Professor in the School of Music at Cardiff University. She is co-editor (with Julian Rushton) of Europe, Empire, and Spectacle in Nineteenth-Century British Music (Ashgate, 2006) and co-editor (with Peter Holman) of the series Music in Britain, 1600-1900 (Boydell and Brewer). Hilary Poriss is Associate Professor of Music at Northeastern University and author of Changing the Score: Arias, Prima Donnas, and the Authority of Performance (OUP, 2009).