A good six years following its first performance in Milan (1773) a second version of Exsultate, jubilate was completed for a performance on Trinity Sunday in 1779. It has survived in a manuscript from Salzburg. This “Salzburg version,” which was discovered in 1978, differs from the “Milan version” primarily through the use of flutes instead of oboes and also through the use of two different texts for the first aria. In the first version the text refers to Christmas, whereas in the second version...