J. S. Bach, aria “Ich freue mich auf meinen Tod” from Cantata 82: (a) oboe, from autograph composing score (Bach neglected to mark the flat needed on the last note of the first full measure, but a later A has a natural sign); (b) flute from later manuscript part, with possible tonguing (articulation) after Quantz; (c) oboe from later autograph manuscript part