we've got. Don't shoot until you are certain of your aim," added Mr. Porter.
A portion of his strength had come back to him, and the new alarm gave him temporary vigor. Yet he knew that to fight off two angry bears would not be easy, and he looked around for some better shelter than that which they at present possessed.
"Here is a small opening between the rocks,—let us back into it, if the bears press us too closely," said he.
He had scarcely spoken when the wounded bear advanced, followed closely by its mate. Dave waited until the foremost beast was within a dozen paces of him, then he fired. There was a growl of pain and the bear tumbled back, landing against its mate.
"Good!" cried Mr. Porter. "Look out!" he added, a second later. "The other one is coming!"
He was right. The bigger bear of the two came forward with a bound, landing almost at Dave's feet. Crack! crack! went Mr. Porter's pistol, and the huge animal was hit twice, in the breast and in the neck. The bear uttered a sound that was half growl and half yelp and then came on again. Crack! went Dave's pistol, and the bullet hit the beast directly in the teeth, knocking one of them down the animal's throat. Wounded and alarmed, the bear stood still, and again the boy
