Brewer's: Richard II.'s Horse
Roan Barbary. (See Horse.)
Oh, how it yearned my heart when I beheld In London streets, that coronation day, When Bolingbroke rode on roan Barbary, That horse that hou so often hast bestrid, That horse that I so carefully have dressed.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894