Frank began to doubt. He was forced to confess to himself that such a thing was remarkable. If the girl had had but one bad bill in her possession, it would have seemed that she had obtained it unwittingly; but two—and exactly alike——

"Can it be possible she is, in some way, connected with a gang of counterfeiters?" Frank asked himself. "I will not believe it! Her face is too innocent."

Then he remembered how, in the city of Chicago, he had encountered a beautiful girl who was connected with counterfeiters; but he also remembered that she was an unwilling tool, and had embraced the first opportunity to get clear of the meshes of the net into which she had fallen.

"If Isa Isban is connected with such a gang, I am certain it is against her will."

Then he thought how, when she had discovered that he had plenty of money, she had hastened to get him to change two fifty-dollar bills, and his faith was shaken.

"It looks bad," he confessed.

As he approached the place where he had left Bart on guard over the house in which the girl was believed to be, he passed a livery stable. He was hurrying on when some one ran out of the stable and clutched him by the arm.

"Just in time!" palpitated the voice of Bart Hodge.

"Hello!" exclaimed Frank, surprised. "Just in time for what?"

"They're gone!"