"I am sure I am exceedingly obliged to you," said Browne. "But will you answer me one more question?"
"I will answer a hundred if they will help you," the other replied. "But what is this particular one?"
"I want to know why you did not tell us all this, when we were discussing the matter at the house just now."
"Because in these matters the safest course is to speak into one ear only. If you will be guided by me you will follow my example. When no one knows what you are going to do, save yourself, it is impossible for any one to forestall or betray you."
By this time they had reached the corner of the Rue Auber. Here the old gentleman stopped and held out his hand.
"At this point our paths separate, I think," he said, "and I have the honour to wish you good-night."
"But what about that address in Hong-kong?" Browne inquired. "As I leave for England to-morrow, it is just possible that I may not see you before I go."
"I will send it to your hotel," Herr Sauber replied. "I know where you are staying. Good-night, my friend, and may you be as successful in the work you are undertaking as you deserve to be."
Browne thanked him for his good wishes, and bade him good-night. Having done so, he resumed his walk alone, with plenty to think about. Why it should have been so he could not tell, but it seemed to him that, since his interview with the old man, from whom he had just parted, the whole aspect of the affair to which he had pledged himself had changed. It is true that he had had his own suspicions of Madame Bernstein from the beginning, but they had been only the vaguest surmises and nothing more. Now they seemed to have increased, not only in number, but in weight; yet, when he came to analyse it all, the whole fabric tumbled to pieces like a house of cards. No charge had been definitely brought against her, and all that was insinuated was that she might possibly be somewhat indiscreet. That she was as anxious as they were to arrange the escape of Katherine's father from the island, upon which he was imprisoned, was a point which admitted of no doubt. Seeing that Katherine was her best friend in the world, it could scarcely have been otherwise. And yet there was a nameless something behind it all that made Browne uneasy and continually distrustful. Try how he would, he could not drive it from his mind; and when he retired to rest, two hours later, it was only to carry it to bed with him, and to lie awake hour after hour endeavouring to fit the pieces of the puzzle together.
Immediately after breakfast next morning he made his way to the gardens of the Tuileries. He had arranged on the previous evening to meet Katherine there, and on this occasion she was first at the rendezvous. As soon as she saw him she hastened along the path to meet him. Browne thought he had never seen her more becomingly dressed; her face had a bright colour, and her eyes sparkled like twin diamonds.