Autograph letter signed “Hans-Hermann Nissen” dated “8.4.1966” by the German operatic bass-baritone, mainly associated with Wagner roles. Nissen writes to his correspondent thanking him about the few lines he sent him, presumably regarding one of his performance. 1 p. on letterheaded paper. In fine condition. Included: Typed letter by Nissen, where he informs his correspondent about the TV broadcasting of the opera The Bartered Bride by Bedřic Smetana. 1 p. In fine condition.