All day this feeling of unrest and apprehension continued, and at night when he went upstairs to bed it was stronger than ever.  He felt convinced now that Ella was deliberately avoiding him.  But then, if she distrusted him, that must be because she feared he was on her stepfather’s side, and if it seemed to her that who was on his side was of necessity an object of suspicion to herself, then there could be no such bond of dread and guilt between them as any guilty knowledge on her part of Wright’s death would involve.

The substantial proof this exercise in logic appeared to afford of Ella’s innocence brought him much comfort, but did not lighten his sense of apprehension and unrest, for he thought that in this situation in which he found himself his doubts of Ella had merely been turned into doubts on Ella’s part of himself, and that the one was just as likely as the other to end disastrously.

“Though I don’t know what I can do,” he muttered as he stood in his attic, “if I gain Deede Dawson’s confidence I lose Ella’s, and if I win Ella’s, Deede Dawson will at once suspect me.”

He went over to the window and looked out, supporting himself on his elbows, and gazing moodily into the darkness.

As he stood there a faint sound came softly to his ear through the stillness of the quiet night in which nothing stirred.

He listened, and heard it again.  Beyond doubt some one was stirring in the garden below, moving about there very cautiously and carefully, and at once Dunn glided from the room and down the stairs with all that extraordinary lightness of tread and agility of movement of which his heavy body and clumsy-looking build gave so small promise.

He had not been living so many days in the house without having taken certain precautions, of which one had been to secure for himself a swift and silent egress whenever necessity might arise.

Keys to both the front and back doors were in his possession, and the passage window on the ground floor he could at need lift bodily from its frame, leaving ample room for passage either in or out.  This was the method of departure he chose now since he did not know but that the doors might be watched.

Lifting the window down, he swung himself outside, replacing behind him the window so that it appeared to be as firmly in position as ever, but could be removed again almost instantly should need arise.

Once outside he listened again, and though at first everything was quiet, presently he heard again a cautious step going to and fro at a little distance.

Crouching in the shadow of the house, he listened intently, and soon was able to assure himself that there was but one footstep and that he would have only one individual to deal with.

“It won’t be Deede Dawson’s,” he thought to himself, “but it may very likely be some one waiting for him to return.  I must find out who—­and why.”