Another mode of propitiating the gods was by sacrifice. Animals, the fruits of the fields, and even human beings were devoted to this purpose. In the matter of sacrifice, the practical genius of the Roman people was again forcibly manifested. They were tactful enough to adapt the sacrifice to the whims and tastes of the gods. A provision of the Twelve Tables was that "such beasts should be used for victims as were becoming and agreeable to each deity." The framers of these laws evidently believed that the gods had keenly whetted appetites and discriminating tastes in the matter of animal sacrifice. Jupiter Capitolinus was pleased with an offering of white cattle with gilded horns, but would not accept rams or bulls. Mars, Neptune and Apollo were, on the other hand, highly delighted with the sacrifice of bulls. It was also agreeable to Mars to have horses, cocks, and asses sacrificed in his honor. An intact heifer was always pleasing to the goddess Minerva. A white cow with moon-shaped horns delighted Juno Calendaris. A sow in young was sacrificed to the great Mother; and doves and sparrows to Venus. Unweaned puppies were offered as victims of expiation to the Lares and Penates. Black bulls were usually slaughtered to appease the infernal gods. The most careful attention was given to the selection of the victims of sacrifice from the flocks and herds. Any serious physical defect in the animal disqualified. A calf was not fit for slaughter if its tail did not reach to the joint of the leg. Sheep with cloven tongues and black ears were rejected. Black spots on a white ox had to be rubbed white with chalk before the beast was available for sacrifice. Not only animals were sacrificed, but human beings as well, to appease the wrath of the gods in time of awful calamity. In early Roman history, gray-headed men of sixty years were hurled from the Pons Sublicius into the Tiber as an offering to Saturn. In the year 227 B.C., the pontiffs discovered from the Sibylline books that the Gauls and Greeks were to attack and capture the city. To fulfill the prophecy and, at the same time to avert the danger, the senate decreed that a man and woman of each of these two nations should be buried alive in the forum as a form of constructive possession. This was nothing but a human sacrifice to the gods. Again, two of Cæsar's soldiers, who had participated in a riot in Rome, were taken to the Campus Martius and sacrificed to Mars by the pontiffs and the Flamen Martialis. Their heads were fixed upon the Regia, as was the case in the sacrifice of the October-horse. As an oblation to Neptune, Sextus Pompeius had live men and horses thrown into the sea at the time when a great storm was destroying the fleet of the enemy.