Calvocoressi lectured at the École des Hautes Études Sociales from 1905 to 1914, teaching about contemporary music. At the onset of World War I, the Greek Calvocoressi found himself unable to serve the French cause. He moved to London and served as a cryptographer. He spent the rest of his life in England, was naturalized, married an English citizen, and wrote the remainder of his books in English. Calvocoressi was a member of the Apaches music society. He died in London on 1 February 1944.
