Fonds contains manuscript musical scores of Harriss' compositions: pieces for the keyboard, some orchestral works, organ music, part-songs and lieder, religious vocal music and patriotic songs. The rest of the fonds comprises a small amount of correspondence, much of it about the Imperial choir (1910), a photocopy of an autobiography covering the period 1862-1885, photographs of Harriss conducting Empire Day concerts (approximately 1920), and programs, 1890, 1924.