| Title | Air 20 (t) |
| Short Title | Cobler's Op-2, 1729 |
| Page | T22M7 |
| Genre | BA |
| Country | E |
| Instruments | VO |
| Incipit | //3234//512//314321//25 |
| Indicated Tune | On Yonder High Mountain (it) |
| First Line | Ah, Foolish Peg welfleet (fl) |
| Stress Notes | 3532 |
| Intervals | -2,2,2,2,-5,2,2,-3,4,-2,-2,-2,2,4, |
| Time Signature | 3/4 |
| Do | C |
| Date | 1729 |
| Nota Bene | Music marked air 21 |
| Number | K16.21 |