Original: From 1878 to 1880 he was Hofkapellmeister in Hanover , but was forced to leave after fighting with a tenor singing the '' Knight of the Swan '' role in Lohengrin ( von Bülow had called him the '' Knight of the Swine '' ) .
Simplified: From 1878 to 1880 he was conductor in Hanover , but had to leave after a quarrel with a tenor .