Jerry of the Islands by Jack London

One thing Jerry learned early on the _Ariel_, namely, that nigger-chasing was not permitted. Eager to please and serve his new gods, he took advantage of the first opportunity to worry a canoe-load of blacks who came visiting on board. The quick chiding of Villa and the command of Harley made him pause in amazement. Fully believing he had been mistaken, he resumed his ragging of the particular black he had picked upon. This time Harley's voice was peremptory, and Jerry came to him, his wagging tail and wriggling body all eagerness of apology, as was his rose-strip of tongue that kissed the hand of forgiveness with which Harley patted him.

Next, Villa called him to her. Holding him close to her with her hands on his jowls, eye to eye and nose to nose, she talked to him earnestly about the sin of nigger-chasing. She told him that he was no common bush- dog, but a blooded Irish gentleman, and that no dog that was a gentleman ever did such things as chase unoffending black men. To all of which he listened with unblinking serious eyes, understanding little of what she said, yet comprehending all. "Naughty" was a word in the _Ariel_ language he had already learned, and she used it several times. "Naughty," to him, meant "must not," and was by way of expressing a taboo.