A person employed to take care of horses in a stable(noun)
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Use "stableman" in a sentence
"He called his stableman, told him to put up the horses, and went to his room."
""I am 'stableman' for three days, and so missed a bathing parade to-day, which is a nuisance, as there is no means of washing here nearer than a river some distance off, to which the others rode."
"A stableman came on the run to take the mare, and Forrest, scarce pausing for a word about a horse by the name of Duddy, was clanking his spurs into the Big House."