Bridge had strong pacifist convictions, and he was deeply disturbed by the First World War, after which his compositions, beginning in 1921–24 with the Piano Sonata, were marked by a radical change in musical language.[clarification needed] The Bridge chord is fairly dissonant, containing seconds as well as two tritones.
^Mark Thornton Burnett, Adrian Streete, and Ramona Wray, eds. (2011). The Edinburgh Companion to Shakespeare and the Arts, p.174. Edinburgh University Press. ISBN 9780748635238.
^Hold, Trevor (2005). Parry to Finzi: Twenty English Song-composers, p.180. Boydell Press. ISBN 9781843831747.
^Payne, Anthony, Paul Hindmarsh, and Lewis Foreman. 2001. "Bridge, Frank". The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell. London: Macmillan Publishers.