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According to Anthony Payne, Paul Hindmarsh and Lewis Foreman, Bridge had strong pacifist convictions, and he was deeply disturbed by the First World War. The Bridge chord appears to have been introduced in the years following the War, as Bridge experimented with more prominent use of dissonance in his musical language and a more structured method of composition. Its first use in his published work is in the Piano Sonata (1921–24). The Bridge chord is fairly dissonant, with two minor seconds, two major seconds, one augmented second, and two tritones contained in the chord.
Mark Thornton Burnett, Adrian Streete, and Ramona Wray, eds. (2011). The Edinburgh Companion to Shakespeare and the Arts, p. 174. Edinburgh University Press. ISBN9780748635238.
Hold, Trevor (2005). Parry to Finzi: Twenty English Song-composers, p.180. Boydell Press. ISBN9781843831747.
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.