Willem Mengelberg
According to Joseph Horowitz, Seidl's death was followed by "five unsuccessful seasons" under Emil Paur [music director from 1898 to 1902] and Walter Damrosch [who served for only one season, 1902/03]." After this, he says, for several seasons [1903–1906] the orchestra employed guest conductors, including Victor Herbert, Édouard Colonne, Willem Mengelberg, Fritz Steinbach, Richard Strauss, Felix Weingartner, and Henry Wood.