Williams's 70th birthdayImprovisations on Virginal Pieces by Giles Farnaby, Op. 50 Overture Resurgam (Plymouth 1942), Op. 149 Concertante Piano Piano Concerto, Op. 30, withdrawn Sinfonia Concertante in C, Op. 38 (1934–36, rev. early 1940s) Piano Concerto in G, Op. 85 Violin Violin Concerto in A, Op. 103 Improvisation for Violin and Orchestra, Op. 89 Viola Viola Concerto in A, Op. 75 CelloSoliloquy, Op. 57 for cello, two horns, timpani and strings Instrumental Violin Sonatas Violin Sonata No. 1, Op. 11 Violin Sonata No. 2, Op. 31 Violin Sonata No. 3, Op. 133 Cello Sonata in G, Op. 60 Meditationi sur Coeurs Désolés (for Recorder and Harpsichord or Flute or Oboe and Piano), Op. 67 Oboe Sonata in C, Op. 100 Meditations on a Byzantine Hymn (for solo Viola), Op. 117 Sonatina for Treble Recorder and Harpsichord, Op. 128 Fantasia on a Chord: for Treble Recorder, Harpsichord and Viola da Gamba (ad lib.), Op. 154 Duo for Cor Anglais and Piano, Op. 156 Chamber String Quartets String Quartet No. 1 in F minor, Op. 35 String Quartet No. 2 in E-flat, Op. 73 String Quartet No. 3, Op. 112 String Quartet No. 4, Op. 150 Piano Trio No. 1, Op. 68, in one movement Piano Trio No. 2, Op. 138 Fantasia on a Theme of Machaut, Op. 86, for Flute, Harpsichord, and String Quartet Lyric Movement for String Quartet and Piano, Op. 24 Choral Dormi Jesu, Op. 3 Five Motets, Op. 37 for unaccompanied SATB choir Five Madrigals, Op. 51 for unaccompanied SATB choir Missa Cantuariensis, Op. 59 for double choir Magnificat and Nunc dimittis in A flat, Op. 65 for chorus and organ Missa in honorem Sancti Dominici, Op. 66 (Rubbra’s first Roman Catholic mass and the result of his conversion) Three Motets, Op. 76 for unaccompanied SATB choir Nine Tenebrae Motets, Op. 72 (a, b and c, three sets of three written over a period of time) Festival Gloria, Op. 94 for unaccompanied SATB choir That Virgin's Child Most Meek, Op. 114 And when the builders Op. 125 for SATB choir and organ Missa Brevis, Op. 137 for treble voices and organ For chorus and orchestraThe Morning Watch, Op. 55Song of the Soul, Op. 78Inscape (Gerard Manley Hopkins), Op. 122Veni Creator Spiritus, Op. 130 Piano music Sonatina, Op. 19 Introduction & Fugue, Op. 19c Prelude and fugue on a theme by Cyril Scott (also played on organ), Op. 69