Guesswork (US)
| Year of Birth | 1916 |
| Sex | mare |
| Colour | ? |
| Sire | Peter the Great (US) |
| Dam | Elsie Leyburn (US) |
| Damsire | Expedition (US) |
| Breeder | |
| Birthplace |
Pedigree
Foals
| YoB | Name | Colour | Sex | Pedigree | Breeder | Birthplace |
|---|---|---|---|---|---|---|
| 1937 | Vivian Hanover (US) | mare | Guy McKinney (US) - Guesswork (US) |