Let him cool off gradually, and don't give him any water until he gets dry.

I'll come in to-morrow and pay your people what I owe them." The negro curry-combed his fingers down the horse's flanks as if to assure himself of his condition, and in the movement brought his face under the glare of the overhead light.
Harry grabbed him by the shoulder and swung him round.
"Todd--you rascal! What are you doing here?
Why are you not down on the Eastern Shore ?" His astonishment was so intense that for an instant he could not realize he had the right man.
The negro drew back.

He was no runaway slave, and he didn't intend to be taken for one--certainly not by a man as rough and suspicious looking as the one before him.
"How you know my name, man ?" He was nervous and scared half out of his wits.

More than one negro had been shanghaied in that way and smuggled off to sea.
"Know you! I'd know you among a thousand.

Have you, too, deserted your master ?" He still held him firmly by the collar of his coat, his voice rising with his wrath.