LS: John Coigliano; LS: Michael De Stefano; LS and ALS: Joseph Bernstein; Correspondence and records detailing legal case between violinist Michael De Stefano and NY Philharmonic regarding mandatory retirement at the age of 65, dispute about his true age and arbitration awarded him for continuted tenure with NY Philharmonic; Correspondence regarding Coigliano's retirement; Correspondence concerning Mordecai Dayan's ill health and subsequent absence; Further corresondence regarding De Stefano's retirement; Correspondence about violinist Joseph Bernstein including details concerning rehearsal conduct, instrument loan agreement, and disability payments