Moscheles never ceased to promote the music of Beethoven and gave many recitals of his music: in 1832 he conducted the London premiere of Beethoven's "Missa Solemnis", and he translated A.F. Schindler's biography of Beethoven into English. He was an early exponent of the piano recital – the concert of music for piano alone, the innovation of which is disputed between Liszt and Moscheles. Moscheles notably reintroduced the harpsichord as a solo recital instrument. He also often performed in concert with Mendelssohn in London (and elsewhere) – one great favourite of both musicians were Bach's concerti for multiple keyboard instruments. On these occasions Mendelssohn and Moscheles were renowned for vying with each other in impromptu cadenzas. Performances of the three-harpsichord concerto were given, on one occasion with Thalberg at the third keyboard, on another with Clara Schumann. Moscheles often appeared as a conductor, especially of Beethoven.