door, a little weak with the revulsion of relief upon her, her hands pressed hard against her temples, staring unseeingly about the garret. He was gone. He filled her with terror. Every instinct she possessed, every fiber of her being revolted against him. He was gone. Yes, he was gone—for the time being. But—but what was the end of all this to be?"
She shook her head after a moment, shook it helplessly and wearily, as, finally, she walked over to the washstand, took the piece of paper from the bodice of her dress, and spread it out under the candle light. A glance showed her that it was in cipher. There was the stub of a pencil, she remembered, in the washstand drawer, and, armed with this, and a piece of wrapping paper that had once enveloped one of Gypsy Nan's gin bottles, she took up the candle, crossed the garret, and sat down on the edge of the cot, placing the candle on the chair in front of her.
If the last three days had been productive of nothing else, they had at least furnished her with the opportunity of studying the notebook she had found in the secret hiding place, and of making herself conversant with the gang's cipher; and she now set to work upon it. It was a numerical cipher. Each letter of the alphabet in regular rotation was represented by its corresponding numeral; a zero was employed to set off one letter from another, and the addition of the numerals between the zeros indicated the number of the letter involved. Also, there being but twenty-six letters in the alphabet, it was obvious that the addition of three nines, which was twenty-seven, could not represent any letter, and the combination of 999 was therefore used to precede any of the arbitrary groups of numerals which were employed to express phrases and sentences, such as the 739 that she had found
