| Title | The Mystic Isle, or The Law of Averages | 
| Alternative title | An Entirely Original Comic Opera in Two Acts | 
| Creators | John B. Grant (composer) and Sydney Rosenfeld (librettist) | 
| Opus | |
| Instrumentation | voices, mixed chorus and orchestra | 
| Number of movements | — | 
| Keys | — | 
| Composed | — | 
| First published | 1886 | 
| Dedication | — | 
| Tempo markings | — | 
| Metronome markings | — | 
| Time signatures | — | 
| Average duration (sec) | — | 
| Number of measures | — | 
| Composition types | Comic operas | 
| Language | English | 
| Period | Romantic | 
| View on IMSLP |  | 
| Code |  | 
(No sections)
(No arrangements)
| Details | Section | Type | Publisher | Date | File | 
|---|---|---|---|---|---|
| view | Complete | vocal score | Philadelphia: Lee & Walker | 1886 | Complete Score · view | 
(No recordings)
©2025 David P. Anderson