It must have been, she thought, after a little over an hour that the first expected movement made itself felt—­a long trembling shudder through the wood beneath her hands, followed by a strange sensation of lightness, as if the whole table rose a little from the floor.  Then, almost before the movement subsided, a torrent of little taps poured itself out, as delicate and as swift and, it seemed, as perfectly calculated, as the rapping of some minute electric hammer.  This was new to her, yet not so unlike other experiences as to seem strange or perturbing in any way....  Again she bent her attention to the table as the vibration ceased.

There followed a long silence.

It must have been about ten minutes later that she became aware of the next phenomenon; and her attention had been called to it by a sudden noiseless uplifting of the profile on her left.  She turned her face to the cabinet and looked; and there, perfectly discernible, was some movement going on between the curtains.  For the moment she could see the medium clearly, his arms folded, indicated by the white lines of his cuffs across his breast, his head sunk forward in deep sleep; and at the next instant the curtains flapped two or three times, as if jerked from within, and finally rested completely closed.

She glanced quickly at the boy on her left, and in the diffused light from the other room could see him distinctly, his eyes open and watching, his lips compressed as if in some tense effort of self-control.

When she looked at the cabinet again she could see that some movement had begun again behind the curtains, for these swayed and jerked convulsively, as if some person with but little room was moving there.  And she could hear now, as the gusts outside lulled for a moment, the steady rather stertorous breathing of the medium.  Then once again the wind gathered strength outside; the rain tore at the glass like a streaming handful of tiny pebbles, and the great curtains at her side lifted and sighed in the draught through the shutters.

When it quieted again the breathing had become a measured moaning, as that which a dreaming dog emits at the end of each expiration; and she herself drew a long trembling breath, overwhelmed by the sense of some struggle in the room such as she had not experienced before.

It was impossible for her to express this even to herself; yet the perception was clear—­as clear as some presentment of the senses.  She knew during those moments, as she watched the swaying curtains of the cabinet in the shaded light that fell upon them, and heard now and again that low moan from behind them, that some kind of stress lay upon something that was new to her in this connection.  For the time she forgot her undertone of anxiety as to this boy at her side, and a curious terrified excitement took its place.  Once, even then, she glanced at him again, and saw the motionless profile watching, always watching....