Evidently his mission was to protect me only, I thought, but when we reached the edge of the city he suddenly sprang before me, uttering strange sounds and baring his ugly and ferocious tusks. Thinking to have some amusement at his expense, I rushed toward him, and when almost upon him sprang into the air, alighting far beyond him and away from the city. He wheeled instantly and charged me with the most appalling speed I had ever beheld. I had thought his short legs a bar to swiftness, but had he been coursing with greyhounds the latter would have appeared as though asleep on a door mat. As I was to learn, this is the fleetest animal on Mars, and owing to its intelligence, loyalty, and ferocity is used in hunting, in war, and as the protector of the Martian man.