[Sullivan, Arthur. (1842–1900)] [Klein, Herman. (1856–1934)] Group of Autograph LettersThree autograph letters relating to the British composer best known for his collaborations on more than a dozen classic comic operas with librettist W. S. Gilbert. The first letter (July 29, [n. y.], 1 p.) from Charlotte Knollys, lady in waiting to Princess Alexandra, is addressed to Sullivan and accepts a copy of "The Musical Season." The two other letters are addressed to the English music critic, singing teacher and Gilbert & Sullivan authority