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.