"All right," agreed the other young men.
"But don't run after Mabel," put in Walter with a laugh.
But that was exactly what Jack Kimball did.
CHAPTER X
MYSTERY UPON MYSTERY
Cora, healthy though she was, did not sleep well that night. Jack did not return to the hall, and had left word with the doorkeeper that he could not get back in time to see his sister but would run up from his bungalow early the next morning. It was early now, and next morning, but Jack had not kept his word.
No one but Cora and Hazel had any idea that this might mean anything important.
"It was so strange, the way that man acted," said Hazel to Cora, as the two made their way to the spring for fresh water. "First he watched you, then when Mabel Blake appeared he kept his eye on her. And such eyes! I believe he could hypnotize any one."
"I hope he did not hypnotize Mabel," replied Cora.
"Or Jack," added Hazel.