The master horse ordered a sorrel nag, one of his servants, to untie the largest of these animals, and take him into the yard.
Jonathan Swift. Gulliver's Travels Into Several Remote Regions of the World (1726)
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one evening he announced triumphantly that he had got it: "A black sorrel mare." To his thinking, he explained, "black" conveyed a hint ol elegance and opulence.
"It won’t do," Rieux said.
‘Why not?’
"Because 'sorrel' doesn’t mean a breed of horse; it’s a color."
"What color?"
"Well—er—a color that, anyhow, isn’t black."
Albert Camus. The Plague (Stuart Gilbert translation) (1948)
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The old count’s horse, a sorrel gelding called Viflyanka, was led by the groom in attendance on him,
Leo Tolstoy. War and Peace: With bonus material from Give War and Peace A Chance by Andrew D. Kaufman . Simon & Schuster
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A huge, evil-tempered sorrel stallion, he was ridable by no one, and only Old Alec and Jamie dared go near him.