(b Vienna, 1883; d Vienna, 1967).
Austro‐Eng. music scholar and art critic. Wrote book on Schubert 1905 and biog. 1913–14. Worked at Vienna Univ. art‐history library 1909–12. Mus. lib. to A. van Hoboken 1926–35. Went to Eng. 1939, settling in Cambridge. Naturalized 1947, returned to Vienna 1952. Ed., Brit. Union Catalogue of Early Mus. 1946–50. Author of books on Handel (1955), Haydn, Schumann, and Beethoven, but his masterpieces are his books on Schubert. These incl. an edn. of all documents, pictures, and relevant material (1914, Eng. edn. 1946) and a thematic catalogue (1951, rev. by others 1978) which gave all Schubert's works D nos. Also wrote documentary biography of Mozart (1961, Eng. edn. 1963, suppl. 1978).