In a few moments he was out again, circling mules and rider, barking his angry protests, then dodging off the trail into the bushes where they heard him barking with a different note in his voice.
"There comes the bear!" cried Nora.

"Look at him!" "Yes, and there comes Hindenburg bucking the line," added Hippy.
The bear, followed by the dog, burst into sight just at the moment that Hindenburg nipped the bear's hind leg.

Henry whirled, made a pass at the pup, and missed him.

The bear then charged Hindenburg with mouth wide open, and the battle was on.
[Illustration: The Bear Advanced, Sparring Like a Prize Fighter.] "Call off yer dog," shouted Joe.
"Call off your bear," answered Hippy Wingate.
The guide tried to do so and failed.

Hippy's efforts to draw Hindenburg from the fray met with no better success.
It was at this juncture that the bear scored first blood.