Superb autographs, 1926, from the legendary quartet, lead by Arnold Rose (1863-1946), who was Mahler's brother-in-law and who worked closely with Brahms and others. The quartet gave first performances of works by Brahms, Reger, Pfitzner, Korngold, Schmidt, Schoenberg (first 2 Quartets) and Webern (Five Movements). Signed on the verso by Finnish opera singer, Helge Lindberg (1887-1927).