ight to come; to wait
for the rock to open as it had the night before, and to make a sortie
through it for Thora before it could close again.

"Our path lay clear before us. We had to spend that night on
Nan-Tauach!

"We had, of course, discussed the sleep phenomena very fully. If our
theory that lights, sounds, and Thora's disappearance were linked with
secret religious rites of the natives, the logical inference was that
the slumber had been produced by them, perhaps by vapours--you know as
well as I, what extraordinary knowledge these Pacific peoples have of
such things. Or the sleep might have been simply a coincidence and
produced by emanations either gaseous or from plants, natural causes
which had happened to coincide in their effects with the other
manifestations. We made some rough and ready but effective
respirators.

"As dusk fell we looked over our weapons. Edith was an excellent shot
with both rifle and pistol. We had decided that my wife was to remain
in the hiding-place. Stanton would take up a station on the far side
of the stairway and I would place myself opposite him on the side near
Edith. The place I picked out was less than two hundred feet from her,
and I could reassure myself now and then as to her safety as it looked
down upon the hollow wherein she crouched. From our respective
stations Stanton and I could command the gateway entrance. His
position gave him also a glimpse of the outer courtyard.

"A faint glow in the sky heralded the moon. Stanton and I took our
places. The moon dawn increased rapidly; the disk swam up, and in a
moment it was shining in full radiance upon ruins and sea.

"As it rose there came a curious little sighing sound from the inner
terrace. Stanton straightened up and stared intently through the
gateway, rifle ready.

"'Stanton, what do you see?' I called cautiously. He waved a
silencing hand. I turned my head to look at Edith. A shock ran through
me. She lay upon her side. Her face, grotesque with its nose and mouth
covered by the respirator, was turned full toward the moon. She was
again in deepest sleep!

"As I turned again to call to Stanton, my eyes swept the head of the
steps and stopped, fascinated. For the moonlight had thickened. It
seemed to be--curdled--there; and through it ran little gleams and
veins of shimmering white fire. A languor passed through me. It was
not the ineffable drowsiness of the preceding night. It was a sapping
of all will t