"'Bart,' called Dan," she went on, "and there was such anger in his face that I think I was more afraid of him than of the big dog.
"Bart turned to him with a snarl and bared his teeth. When Dan saw that his face turned--I don't know how to say it!"
She stopped a moment and her hands tightened.
"Back in his throat there came a sound that was almost like the snarl of Black Bart. The wolf-dog watched him with a terror that was uncanny to see, the hair around his neck fairly on end, his teeth still bared, and his growl horrible.
"'Dan!' I called, 'don't go near him!'
"I might as well have called out to a whirlwind. He leaped. Black Bart sprang to meet him with eyes green with fear. I heard the loud click of his teeth as he snapped--and missed. Dan swerved to one side and caught Black Bart by the throat and drove him into the dust, falling with him.
"I couldn't move. I was weak with horror. It wasn't a struggle between a man