Alexander Grechaninov was one of the most important composers of the late Russian Romantic School. By the second half of the twentieth century he remained one of the few living composers who continued the traditions of the great Russian Romantic masters, such as Tchaikovsky and Rimsky-Korsakov. He is primarily known for his liturgical works, which are truly masterpieces of this genre. Because many of his instrumental works remain unpublished, particularly the chamber works, they continue to be undeservedly ignored in the concert hall. Grechaninov's unpublished works for clarinet include Septet for Clarinet, Bassoon and String Quintet, Op. 172a, Serenade for Clarinet and String Orchestra (without opus number), and Sonata No. 1 for Clarinet and Piano, Op. 161. This project not only brings to light Grechaninov's unpublished clarinet works, but also emphasizes the importance of his published clarinet pieces which have to date been forgotten, especially in the United States. The writer prepares a performance edition of the Sonata No. 1, Op.161 from Grechaninov's original autograph manuscript which is held in the New York Public Library's Toscanini Archives. After a brief introduction, the document describes Grechaninov's biography, including his historical and societal background, compositional growth throughout his career, and outside influences …