Cassius M Clay (US) ATR-18
| Year of Birth | 1843 |
| Sex | horse |
| Colour | dark bay |
| Sire | Henry Clay (US) |
| Dam | Jersey Kate (US) |
| Damsire | ? |
| Breeder | Joseph Oliver |
| Birthplace |
Pedigree
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Cassius M Clay
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Foals
| YoB | Name | Colour | Sex | Pedigree | Breeder | Birthplace |
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| Clara (US) | mare | Cassius M Clay (US) - Fanny (US) | ||||
| Gardner Horse (US) | horse | Cassius M Clay (US) - Dam of Gardner Horse (US) | ||||
| Paymaster (US) | horse | Cassius M Clay (US) - | ||||
| 1848 | Cassius M Clay Jr (Neave's) (US) | dark bay | horse | Cassius M Clay (US) - Dam of Cassius M Clay Jr (Neave's) (US) | Charles Mitchell | |
| 1849 | George M Patchen (US) | bay | horse | Cassius M Clay (US) - Dam of George M Patchen (US) | ||
| 1852 | Cassius M Clay Jr (Strader's) (US) | dark bay | horse | Cassius M Clay (US) - Dam of Cassius M Clay Jr (Strader's) (US) | Joseph H. Godwin | |
| 1853 | Cassius M Clay Jr (Jones' 2nd) (US) | bay | horse | Cassius M Clay (US) - Lady Freelove (US) | Joseph H. Godwin & John M'Chesney | |
| 1853 | Iron Duke (Jenning's) (US) | horse | Cassius M Clay (US) - | |||
| 1854 | Cassius M Clay (Amos') (US) | black | horse | Cassius M Clay (US) - Molly (US) | D. B. Amos | |
| 1854 | Cassius M Clay Jr (Rockafellow's) (Rockafellow Horse) (US) | bay | horse | Cassius M Clay (US) - Dam of Rockafellow Horse (US) | Walter Rockafellow | |
| 1872 | Orpheus (US) | horse | Cassius M Clay (US) - |