Original: From 1930-33 he taught at the Berlin Hochschule , from 1944 to 1958 at the Guildhall School of Music , and then at the Musikhochschule Köln ( 1957-82 ) and the Conservatory in Bern ( 1957-85 ) .
Simplified: From 1930-33 he taught at the Berlin Hochschule , from 1944 to 1958 at the Guildhall School of Music , London and then at the conservatory in Bern , Switzerland .