 Massel was a pioneer in the promotion of Hebrew as the national language, publishing works by Israel Cohen and Harry Sacher among others.He wrote Hebrew poems and translated English classics into Hebrew, including Milton’s Samon Agonistes, Longfellow’s Judas Maccabaeus and Fitzgerald’s Omar Khayyam.He also spent two years preparing a unique collection of 94 portraits called "A Gallery of Hebrew Poets; 1725–1903".