So she told him, and how she had deciphered it, and how the word "dynamite" had only confirmed her early suspicions.

His only comment was to say, "Good Heavens!" in a smothered voice.

"It was the extractor that made me suspicious," she finished. "What were you going to extract? Teeth?"

"And so, when my Indian was swimming, you went through his things! It's the most astounding thing I ever—My dear lady, an extractor is used to get the hooks out of fish. It was no cipher, I assure you. I needed an extractor and I ordered it. The cipher you speak of is only a remarkable coincidence."

"Huh!" said Tish. "And the paper you dropped in the train—was that a coincidence?"

"That's not my secret," he said, and turned sulky at once.

"Don't tell me," Tish said triumphantly, "that any young man comes here absolutely alone without a purpose!"

"I had a purpose, all right; but it was not to blow up a railroad train."

Apparently he thought he had said too much, for he relapsed into silence after that, with an occasional muttering.

It was eight o'clock when Hutchins's canoe came into sight. She was paddling easily, but the detective was far behind and moving slowly.