“She wants to know if you will come and help too—­in a certain way only:  not in the experiment itself precisely, but by watching merely and—­” He hesitated an instant, half lowering his eyes.

“Drawing the picture,” Henriot helped him deliberately.

“Drawing what you see, yes,” Vance replied, the voice turned graver in spite of himself.  “She wants—­she hopes to catch the outlines of anything that happens—­”

“Comes.”

“Exactly.  Determine the shape of anything that comes.  You may remember your conversation of the other night with her.  She is very certain of success.”

This was direct enough at any rate.  It was as formal as an invitation to a dinner, and as guileless.  The thing he thought he wanted lay within his reach.  He had merely to say yes.  He did say yes; but first he looked about him instinctively, as for guidance.  He looked at the stars twinkling high above the distant Libyan Plateau; at the long arms of the Desert, gleaming weirdly white in the moonlight, and reaching towards him down every opening between the houses; at the heavy mass of the Mokattam Hills, guarding the Arabian Wilderness with strange, peaked barriers, their sand-carved ridges dark and still above the Wadi Hof.

These questionings attracted no response.  The Desert watched him, but it did not answer.  There was only the shrill whistling cry of the lizards, and the sing-song of a white-robed Arab gliding down the sandy street.  And through these sounds he heard his own voice answer:  “I will come—­yes.  But how can I help?  Tell me what you propose—­your plan?”

And the face of Vance, seen plainly in the electric glare, betrayed his satisfaction.  The opposing things in the fellow’s mind of darkness fought visibly in his eyes and skin.  The sordid motive, planning a dreadful act, leaped to his face, and with it a flash of this other yearning that sought unearthly knowledge, perhaps believed it too.  No wonder there was conflict written on his features.

Then all expression vanished again; he leaned forward, lowering his voice.

“You remember our conversation about there being types of life too vast to manifest in a single body, and my aunt’s belief that these were known to certain of the older religious systems of the world?”

“Perfectly.”

“Her experiment, then, is to bring one of these great Powers back—­we possess the sympathetic ritual that can rouse some among them to activity—­and win it down into the sphere of our minds, our minds heightened, you see, by ceremonial to that stage of clairvoyant vision which can perceive them.”

“And then?” They might have been discussing the building of a house, so naturally followed answer upon question.  But the whole body of meaning in the old Egyptian symbolism rushed over him with a force that shook his heart.  Memory came so marvellously with it.

“If the Power floods down into our minds with sufficient strength for actual form, to note the outline of such form, and from your drawing model it later in permanent substance.  Then we should have means of evoking it at will, for we should have its natural Body—­the form it built itself, its signature, image, pattern.  A starting-point, you see, for more—­leading, she hopes, to a complete reconstruction.”