Appearances outside Sweden included Bayreuth (Kurwenal in Tristan und Isolde, Herald in Lohengrin and Donner in Rheingold), the Edinburgh Festival in 1959 and 1974), Savonlinna in 1989 (Henrik in Singoalla by Gunnar de Frumerie), Hamburg, the Royal Opera House Covent Garden (1960, 1981), Montreal (1967), Moscow, Munich and Oslo.
The Wind Is My Lover (Swedish title: Singoalla) is a novel by Swedish author Viktor Rydberg.