The Cuban blood-hound, of which we hear so much, is not a native of the island, but belongs to an imported breed, resembling the English mastiff, though with longer nose and limbs. He is naturally a fierce, blood-thirsty animal, but the particular qualities which fit him for tracing the runaway slaves are wholly acquired by careful and expert training. This training of the hounds to fit them for following and securing the runaway negroes is generally entrusted to a class of men who go about from one plantation to another, and who are usually Monteros or French overseers out of employment. Each plantation keeps more or less of these dogs, more as a precautionary measure, however, than for actual use, for so certain is the slave that he will be instantly followed as soon as he is missed, and easily traced by the hounds, of whose instinct he is fully aware, that he rarely attempts to escape from his master. In one respect this acts as a positive advantage to the negroes themselves, for the master, feeling a confidence relative to their possession and faithfulness, and well knowing the ease with which they can at once be secured should they run away, is thus enabled to leave them comparatively free to roam about the plantation, and they undergo no surveillance except during working hours, when an overseer is of course always somewhere about, looking after them, and prompting those that are indolent. The blood-hounds are taken when quite young, tied up securely, and a negro boy is placed to tease and annoy them, occasionally administering a slight castigation upon the animals, taking care to keep out of the reach of their teeth. This whipping is generally administered under the direction of the trainer, who takes good care that it shall not be sufficiently severe to really hurt the dogs or crush their spirit of resistance. As the dogs grow older, negro men, in place of boys, are placed to fret and irritate them, occasionally administering, as before, slight castigations upon the dogs, but under the same restrictions; and they also resort to the most ingenious modes of vexing the animals to the utmost, until the very sight of a negro will make them howl. Finally, after a slave has worried them to the last degree, he is given a good start, and the ground is marked beforehand, a tree being selected, when the dogs are let loose after him. Of course they pursue him with open jaws and the speed of the wind; but the slave climbs the tree, and is secure from the vengeance of the animals.