In this first full-scale examination of the theme-and-variations form in the Classical era, Elaine Sisman demonstrates persuasively that it was Haydn's prophetic innovationsplacing the variation in every position of a multi-movement cycle, broadening its array of theme types, and transforming its larger shapethat truly created the Classical variation. She elucidates the concept and technique of variation, traces Haydn's development and use of the...