| Clue | Source | Date |
|---|---|---|
| You dictated right extension for original document | ||
| Composition's original form | The Chronicle of Higher Education | 10 Jul 2015 |
| Composition's original form | ||
| Musical first draft | ||
| Source manuscript | ||
| Original libretto | ||
| Composition's original form | ||
| Composition's original form | ||
| Composition's original libretto |