"You stand and watch the fun, while we rat haters kill a few," suggested Tiger.

"Very well!"

"When I say three, all of you run for the bunch and kill as many as you can," instructed Tiger.

For the next ten minutes you never in all your life heard such squealing, snarling and snipping of teeth as there was in that cellar. Two unusually big cats and two dogs all bound to kill rats were fighting these fierce wharf rats. But what made the battle such a bloody one was that wharf rats are braver than house rats and will fight to the death when attacked. Being large, and having long, sharp teeth, more often than not they get the better of ordinary cats and dogs that are sicked on them. In less than fifteen minutes hundreds of rats had been killed, for Buster was a noted rat killer. All he did was to open his jaws, grab a rat in the middle of its back, give his head a shake and the rat's back was broken. Then he tossed that rat aside and served another one likewise.

The rats had all disappeared or else were lying dead in heaps when Billy heard Stubby give a whine of pain, and turning to discover where he was, he saw him standing in the midst of a pile of dead rats with one nearly half as large as himself hanging to his throat under his jaw. The rat had hold of Stubby in such a way he could not shake him off, and all the time the rat was sucking his blood.

Billy saw him in a minute and with one bound he was beside Stubby and had ripped the rat open with his long, sharp horn, which made its mouth open and set Stubby free.

"Thank you, old fellow, for saving me! I was almost gone when you came with your timely assistance."

"I guess we have had enough fun with rats for one night," said Tiger, "and we better be getting on or we will be late for the opening exercises."