| Name | Guesswork (US) |
| YoB | 1916 |
| Sex | mare |
| Colour | |
| Sire | Peter the Great (US), 1895 |
| Dam | Elsie Leyburn (US), 1898 |
| Damsire | Expedition (US), 1889 |
| Breeder | |
| Birthplace |
| Colour | Gender | Pedigree | Breeder | ||
|---|---|---|---|---|---|
| 1937 | Vivian Hanover (US) | mare | Guy McKinney (US), 1923 - Guesswork (US), 1916 |