Lamperti, Giovanni Battista, The Technics of Bel Canto (New York: G. Schirmer. 1905): 6. (The book is dedicated to his pupil, Marcella Sembrich (1858-1935), who sang regularly at the Metropolitan Opera at the turn of the 20th century and was considered one of the finest coloratura soprano's of her day).  Mr. Trimble owns a first edition copy of this book.