butte. We plunged upon it, began climbing.

The ascent was steep; precipitous in places. There were little
gullies, which expanded as we climbed up them. It seemed that we
should never reach the top, but at last we were there. I was aware
that the drug had ceased its action. The yellow rocky ground was no
longer expanding.

We came to the summit and stood to get back our breath. And Alan and I
gazed with awe upon the top of a rocky hill. Little buttes and strewn
boulders lay everywhere. It was all naked rock, ridged and pitted, and
everywhere yellow-tinged.

Overhead was distance. I could not call it a sky. A blur was
there--something almost but not quite distinguishable. Then I thought
that I could make out a more solid blur which might be the lower lens
of the microscope above us. And there were blurred, very distant spots
of light, like huge suns masked by a haze, and I knew that they were
the hooded lights of the laboratory room.

* * * * *

Before us, over the brink of a five hundred-foot cliff, a great
glistening white plain stretched into the distance. I seemed to see
where it ended in a murky blur. And far higher than our own hilltop
level a horizontal streak marked the rope railing of the slab.

"Well," said Alan, "we're here." He gazed behind us, back across the
rocky summit which seemed several hundred feet across to its opposite
brink. He was smiling, but the smile faded. "Now what, Glora? Another
pellet?"

"No. Not yet. There is a place where we go down. It is marked in my
mind."

I had a sudden ominous sense that we three were not alone up here.
Glora led us back from the cliff. As we picked our way among the naked
crags, it seemed behind each of them an enemy might be lurking.

"Glora, do you know if any of Dr. Polter's men have the drug? I mean,
do they come in and out here?"

She shook her head. "I think not. He lets no one have the drug. He
trusts not any one. I stole it; I will tell you later. Much I have to
tell you before we arrive."

Alan made a sudden sidewise leap, and dashed around a rock. He came
back to us, smiling ruefully.

"Gets on your nerves, all this. I had the same idea you did, George.
Might be someone around here. But I guess not." He took Glora's hand
and they walked in advance of me. "We haven't thanked you yet, Glora."

"Not needed. I came for help from your world. I could not get back to
my own, and I followed the Doctor Polter when