In 1877 Gaul started teaching the first classes in the theory of music, harmony and counterpoint at the Birmingham and Midland Institute, marking the first step towards providing a fully rounded musical instruction at the institution that would eventually become the Royal Birmingham Conservatoire,[3] later becoming Professor of Orchestration and Composition at the school.
[1] Gaul wrote a large quantity of choral music in a simple melodious style influenced by Spohr and Mendelssohn.
[5] At the time of Gaul's death in 1913 it was the most performed work of English choral music in history,[2] and by 1914 over 162,000 copies of its vocal score had been sold.
[10][11] Novello, Ewer & Co., London, published vocal scores of Around the Winter Fire, The Bard of Avon, The Elfin Hill, The Hare and the Tortoise, The Holy City, Israel in the Wilderness, Joan of Arc, The Legend of the Wood, The Passion Service, The Prince of Peace, Ruth, A Song of Life, The Ten Virgins, Toilers of the Deep and Una together with orchestral parts for The Union Jack and piano arrangements of the Gavotte and Musette from Suite No.1.
Autograph scores of Around the Winter Fire, Dance of the Elves, Dance of the Reapers, The Holy City, Israel in the Wilderness, Joan of Arc, The Passion Service, Praise ye the Lord, Ruth, A Song of Life, The Ten Virgins, Una, The Union Jack and Yule-tide are held by the Library of the Royal College of Music (Add.