She entered so silently that he did not hear her, or lift his head from the hand on which it leaned wearily, as he rested his elbow on the desk.  Pausing in the middle of the room, she had time to notice that he had opened a few of the letters lying before him, but had thrust them impatiently from him, evidently unread.  The cablegram she had laid where his glance would immediately fall upon it was between his fingers, but the envelope was unbroken.  His attitude was so much that of a man tired and dispirited that her heart went out to him.

It was perhaps the involuntary sigh that broke from her lips that caused him to look up.  When he did so his eyes fixed themselves on her with a dazed stare, as though he wondered whence and for what she had come.  In the eager attention with which she regarded him she noted subconsciously that he was unshaven and ill-kempt, and that his eyes, as Dorothea had said, were bloodshot.

He dragged himself to his feet, and with forced courtesy asked her to sit down.  She allowed herself to sink mechanically to the edge of the divan where, only an hour ago, Dorothea and she had exchanged happy confidences.  In the minutes of silence that followed, when he had resumed his own seat, she felt as if she were in some queer nightmare, where nothing could be explained.

“Did you ever hear of a young French explorer named Persigny?”

She nodded, without speaking.  The irrelevancy of the question was in keeping with the odd horror of the dream.

“Did you know he was exploring in Brazil?”

“I think I may have heard so.”

“He came up from Rio with me—­on the same steamer.”

She listened, with eyes fixed fast upon him, wondering what he meant.

“He wasn’t alone,” Derek went on, speaking in a lifeless monotone.  “There were others of his party with him.  There was one, especially, with whom I became on terms that were almost—­intimate.”

For the first time it occurred to her that he was trying to see through her thoughts; but in her bewilderment at his words, she met his gaze steadily.

“There was something about this young man that attracted me,” he continued, in the same dull voice, “and I listened to his troubles.  In particular he told me why he had fled from Paris to hide himself in the forests of the Amazon.  Shall I tell you the reason?”

“If you like.”

“It was an old story; in some respects a vulgar story.  He had got into the toils of an unscrupulous woman.”

Her sudden perception of what he was leading up to forced her into a little involuntary movement.

“I see you understand,” he said, quickly, with the glimmer of a smile.  “I thought you would; for, as a matter of fact, much of what he said brought back our conversation on the night before I sailed.  There was not a little in it that was mystery to me at the time, which he—­illumined.”

She sat with lips parted and bosom heaving, her hands clasped tightly in her lap.  If she was conscious of any sensation, it was of terrible curiosity to know how the tale was to be turned.