Belgian musicologist Harry Halbreich died yesterday at the age of 85. Born in 1931 in Berlin, he studied with Arthur Honegger and Olivier Messiaen. From 1970 to 1976 he was Lecturer in Musical Analysis at the Royal Conservatory in Mons. He worked on numerous radio broadcasts and co-founded the Belgian music magazine Crescendo for which he has been major contributor. He wrote books on Olivier Messiaen, Claude Debussy, Arthur Honegger and Bohuslav Martinu and set up musical catalogues of the works of Honegger and Martinu.