"Look out!" yelled Mr. Durban. "To cover, everybody! If that beast get after you it's no fun! You and I will fire at him, Mr. Anderson!"
Mr. Durban raised his rifle, and pulled the trigger, but, for some reason, the weapon failed to go off. Mr. Anderson quickly raised his, but his foot slipped in a wet place and he fell. At that moment the buffalo, with a snort of rage, charged straight for the fallen man.
"Tom! your electric rifle!" yelled Ned Newton, but he need not have done so, for the young inventor was on the alert.
Taking instant aim, and adjusting his weapon for the heaviest charge, Tom fired at the advancing beast. The result was the same as in the case of the whale, the buffalo seemed to melt away. And it was stopped only just in time, too, for it was close to the prostrate Mr. Anderson, who had sprained his ankle slightly, and could not readily rise.
It was all over in a few seconds, but it was a tense time while it lasted.
"You saved my life again, Tom Swift," said Mr. Anderson, as he limped toward our hero. "Once on Earthquake Island, and again now. I shan't forget it," and he shook hands with the young inventor.
The others congratulated Tom on his quick
