This series comprises material relating to a range of Lindsey's other professional activities, such as his orchestrations for the Broadway musical Bajour, his Ph.D. research at Columbia University's Teachers College, his music education work with the Santa Monica-Malibu Unified School District, his forays into classical music, and various live gigs with the Mort Lindsey Orchestra (for banquets and awards ceremonies). This series, which contains material from across the full length of Lindsey's career, primarily comprises scores, spanning a range of formats (parts, full scores, lead sheets, sketches, conductor scores). Many scores in this series relate to Lindsey's ballet The Seven Ages of Man, on which he wrote his Ph.D. thesis (also included in this series). This series also contains scores for various arrangements and compositions that are not identified with a particular performer or project, including sketches for several instrumental themes. Finally, this series includes Lindsey's collection of published scores by other composers - many of which have been annotated, either for performance or in preparation for arrangement.