In the 2008–2009 season, the society celebrated its 40th anniversary. The program included performances by Tallis Scholars, Richard Egarr and Flanders Recorder Quartet as well as a new work commissioned by the society to commemorate the 250th anniversary of the Battle of Fort Duquesne. "Battle of the Forks", an arrangement of writings and music from the period including two pieces of music by the English general John Reid (1721–1807), premiered on September 27, 2008 at Synod Hall in Pittsburgh performed by the Chris Norman Ensemble, Concerto Caledonia and members of the Carnegie Mellon University School of Drama.