One might have supposed that, considering she was now late into the night of the most exacting and exciting day of her whole life, Lucile, once she was safely stowed away in her berth on the train, would immediately fall asleep. This, however, was not the case. Her active brain was still at work, still struggling to untangle the many mysteries that, during the past weeks, had woven themselves into what seemed an inseparable tangle. So, after a half hour of vain attempt to sleep, she sat bolt upright in her berth and snapped on the light, prepared if need be to spend the few remaining hours of that night satisfying the demands of that irreconcilable mind of hers.

The train had already started. The heavy green curtains which hid her from the little outside world about her waved gently to and fro. Her white arms and shoulders gleamed in the light. Her hair hung tumbled in a mass about her. As the train took a curve, she was swung against the hammock in which her heavy coat rested. Her bare shoulder touched something hard.

“The books,” she said. “Wonder what my new acquirement is like?”

She drew the new book from her pocket and, brushing her hair out of her eyes, scanned it curiously.

“French,” she whispered. “Very old French and hard to read.” As she thumbed the pages she saw quaint woodcuts of soldiers and officers. Here was a single officer seated impressively upon a horse; here a group of soldiers scanning the horizon; and there a whole battalion charging a very ancient fieldpiece.

“Something about war,” she told herself. “That’s about all I can make out.” She was ready to close the book when her eye was caught by an inscription written upon the fly leaf.

“Looks sort of distinguished,” she told herself. “Shouldn’t wonder if the book were valuable because of that writing if for nothing else.” In this surmise she was more right than she knew.

She put the book carefully away but was unable to banish the questions which the sight of it had brought up. Automatically her mind went over the incidents which had led up to this precise moment. She saw the child in the university library, saw her take down the book and flee, saw her later in the mystery cottage on Tyler street. She fought again the battle with the hardened foster mother of the child and again endured the torturing moments in that evil woman’s abode. She thought of the mysterious person who had followed her and had saved her from unknown terrors by notifying the police. Had that person been the same as he who had followed her this very night in an attempt to regain possession of the two books? No, surely not. She could not conceive of his doing her an act of kindness. She thought of the person who had followed them to the wall of the summer cottage out at the dunes and wondered vaguely if he could have been the same person who had followed them on Tyler street at one time and at that other saved her from the clutches of the child’s foster parents. She wondered who he could be. Was he a detective who had been set to dog her trail or was he some friend? The latter seemed impossible. If he was a detective, how had she escaped him on this trip? Or, after all, had she? It gave her a little thrill to think that perhaps in the excitement of the day his presence near her had not been noticed and that he might at this very moment be traveling with her in this car. Involuntarily she seized the green curtains and tried to button them more tightly, then she threw back her head and laughed at herself.

“But how,” she asked herself, “is all this tangle to be straightened out? Take that one little book, ‘The Compleat Angler.’ The child apparently stole it from Frank Morrow; I have it from her by a mere accident; Frank Morrow has it from one New York book shop; that shop from another; the other from a theologian; he from a third book shop; and that shop more than likely from a thief, for if he would attempt to steal it from me to-night, he more than likely stole it in the first place and was attempting to get it from me to destroy my evidence against him. Now if the book was stolen in the first place and all of us have had stolen property in our possession, in the form of this book, what’s going to happen to the bunch of us and how are we ever to square ourselves? Last of all,” she smiled, “where does our friend, the aged Frenchman, the godfather of that precious child, come in on it? And what is the meaning of the secret mark?”

With all these problems stated and none of them solved, she at last found a drowsy sensation about to overcome her, so settling back upon her pillow and drawing the blankets about her, she allowed herself to drift off into slumber.