 For the next 20 years he was concertmaster and assistant conductor, appearing as soloist in many violin concertos and giving the first American performances of the concertos by Brahms and Carl Goldmark, as well as the première of the First Violin Concerto of Gustav Strube.As assistant conductor, he led the BSO in its performances at the Columbian Exposition in Chicago in 1893.Shortly after his arrival in Boston, he formed and led the Kneisel Quartet with other BSO string players.