Autograph full score (damaged in places), signed by William Sterndale Bennett only, not dated. Also present is a letter to Mrs Sterndale Bennett from Geoffrey Bush, 4 Feb 1969, who arranged the Concerto for two pianos alone entitling it 'Sonata'. The score is annotated in places by Bush who also effected some crude repairs to the score and arranged for it to be bound. Bush's arrangement was first heard in a BBC broadcast on 20 Mar 1969.