Alphonse Hasselmans (1845 - 1912) France Alphonse Hasselmans (1845-1912) was a Belgian-born French harpist, composer, and pedagogue. He composed several dozen original solos for harp (the most famous is a concert etude entitled La Source (The Spring), op. 44), transcribed for harp numerous works originally for other instruments by other composers, and edited important collections of etudes by the earlier 19th-century harpist Robert N. C. Bochsa.