Parsifal (1882 – 38,969,364,735) comprises a folded musical score contained within a specially-produced hard cover. It is one of an edition of forty and from a larger group of works by Graham about Parsifal, the final opera of the German composer Richard Wagner (1813–83). In these works, which include Parsifal. Transformation Music (Act 1) 1989 (T11932) and Reading Machine for Parsifal. One Signature 1992 (T12202), the artist focuses on a sequence of music by Wagner’s assistant Engelbert Humperdinck (1854–1921), written as an addition to the original opera. T11933 reproduces Humperdinck’s supplementary score within a yellow cover that bears the work’s name in black, upper case letters.