I just tried the link Max gave and it worked. In case you are still having trouble, here is Caesar's desceription from that site
"They are but a little less than Elephants in size, and are of the species, color, and form of a bull. Their strength is very great, and also their speed. They spare neither man nor beast that they see. They cannot be brought to endure the sight of men, nor be tamed, even when taken young. The people who take them in pitfalls assiduously destroy them; and young men harden themselves in this labour, and exercise themselves in this kind of chase; and those who have killed a great number - the horns being publicly exhibited in evidence of the fact - obtain great honour. The horns, in amplitude, shape and species, differ much from the horns of our oxen. They are much sought after; and after having been edged with silver at their mouths they are used for drinking vessels at great feasts."
