"Keep in--Jan; keep in--boy!" said Dick, firmly, as he jumped between
the two dogs.

"Who gave you permission to bring that dog here?" snapped the sergeant
at Dick.

"Taking care of him for Captain Arnutt, sir," was the reply.

"H'm! Well, see you take care of him, then, and keep him out of the way.
Sourdough's boss here, and if this one is to stay around, the sooner he
learns it the better."

"Yes, sir. He's thoroughly good-tempered and obedient, though he is such
a big fellow," said Dick, still manoeuvering his legs as a barrier
betwixt the two dogs.

"It's little odds how big he is," growled the sergeant. "He'll have to
learn his lesson, an' I guess Sourdough will teach him."

Just then Sourdough succeeded in evading Dick and got well home on Jan's
right shoulder with a punishing slash of his razor fangs. Jan gave a
snarl that was half a roar. His antipathy had been aroused at the
outset. Now his blood was drawn. He had been ordered to keep to heel,
but--

"Keep in, there--Jan; keep in--keep in!"

The warning came not a second too soon. Almost the hound had sprung.