"Somebody was here," breathed the Professor.
"Yes!" cried Tad. "I know who that somebody was, too," he shouted triumphantly, dropping down on his knees with face so close to the ground that Chunky wanted to know if Tad were going to eat grass.
[CHAPTER XVII]
PROSPECTORS IN THE HILLS
"No, I am not," answered Tad, "but I am going to tell you who our late caller was. We have seen him before."
"Who—what?" cried the Professor.
"He was one of the two men who assaulted us yesterday."
"Are you sure, Tad?"
"Yes, I'm pretty sure of it," answered Butler, gazing at the ground reflectively.
"But how do you know?"