He arrived in England in 1933, having left Germany to escape the Nazis. From 1935-1939 he lectured at the
City Literary Institute,
London, and in 1940 was interned on the Isle of Man for five months. He became a naturalized British citizen in 1946 and married English
mezzo-soprano Mercia Glossop in 1951. They later divorced. From 1945 to 1979 he worked as a professor of singing and German lieder at the
Guildhall School of Music and Drama in London. His students included baritones
Geraint Evans and
Benjamin Luxon, and sopranos
Jill Gomez and
Patricia Rozario. He was also a jury member for a number of international music festivals, including Bayreuth in 1974, and contributed to the 1978 book
Tensions in the Performance of Music: A Symposium. He lectured extensively in the United States and Australia, and was the London Correspondent for the
Frankfurter Zeitung. He sang as a baritone soloist on the BBC in the 1950s and recorded German lieder and folksongs for Linguaphone under the title
German Songs, Series A. These recordings can be heard at the British Library; some are also held in the historical sound archives of the Robert Schumann Hochschule,
Düsseldorf. After his death, an annual song prize was founded in his name - the Walther Gruner International Lieder Competition. The first winner was
Olaf Bär. This competition is no longer held. ==References==