Henry David Leslie (1822-1896) was an English composer and conductor, primarily associated with the choral and orchestral music of the Victorian era. He is best known for his contributions to sacred music, particularly his anthems and hymns, which remain popular in church settings today. Leslie's notable works include the anthem "The King Shall Rejoice" and various arrangements of traditional hymns. His compositions often feature rich harmonies and vocal textures, reflecting the Romantic style of the period. He also published several collections of choral music, which helped to promote choral singing in English churches. In addition to his composing, Leslie was an influential figure in music education and served as the conductor of the London Choral Society. His impact on music lies in his ability to blend traditional liturgical music with the emerging Romantic aesthetic, thereby enriching the choral repertoire of the time. Leslie's work encouraged the growth of amateur choral singing and contributed to the establishment of a distinctly English choral tradition, influencing later composers in the genre.