Tracklist Hide Credits
| A | –Duke Ellington & His Orchestra* | The Mystery SongWritten-By – Ellington*, Mills* |
| B | –Mills' Blue Rhythm Band* | Moanin'Written-By – White*, Mills* |
Credits
- Vocals – George Morton (tracks: B)
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 22800 | Duke Ellington And His Orchestra / Mills' Blue Rhythm Band* | Duke Ellington And His Orchestra / Mills' Blue Rhythm Band* - The Mystery Song / Moanin' (Shellac, 10") | Victor | 22800 | US | 1931 |
| 22800 | Duke Ellington And His Orchestra / Mills' Blue Rhythm Band* | Duke Ellington And His Orchestra / Mills' Blue Rhythm Band* - The Mystery Song / Moanin' (Shellac, 10") | Victor | 22800 | Canada | 1931 |
