through window and door. And beyond them--

For seconds he stared at the scene outside, barely aware of what he
was looking at, while his mind raced on. He had searched every inch of
the walls. And those thick wooden panels hadn't simply slid aside; the
surfaces of doorframe and window were flush with the adjoining wall
sections. So the McAllen Tube was involved in these changes in the
room--and he might have guessed, Barney thought, that McAllen would
have found more than one manner of putting the space-twisting
properties of his device to use. And then finally he realized what he
was seeing through the window and beyond the door. He walked slowly up
to the window, still breathing unevenly.

The scene was unfamiliar but not at all extraordinary. The cabin
appeared to be part way up one side of a heavily forested, rather
narrow valley. It couldn't be more than half a mile to the valley's
far slope which rose very steeply, almost like a great cresting green
wave, filling the entire window. Coming closer Barney saw the skyline
above it, hazy, summery, brilliantly luminous. This cabin of McAllen's
might be in one of the wilder sections of the Canadian Rockies.

Or--and this was a considerably less happy thought--it probably could
have been set up just as well in some area like the Himalayas.

But a more immediate question was whether the cabin actually _was_ in
the valley or only appearing to be there. The use of the Tube made it
possible that this room and its seeming surroundings were very far
apart in fact. And just what would happen to him then if he decided to
step outside?

There were scattered sounds beyond the open door: bird chirpings and
whistles, and the continuous burring calls of what Barney decided
would be a wild pigeon. Then a swirl of wind stirred the nearer
branches. He could feel the wash of the breeze in the room.

It looked and sounded--and felt--all right.

Barney scowled undecidedly, clearing his throat, then discovered that
a third item had appeared in the room along with the door and the
window. In the wall just this side of the door at shoulder-height was
a small ivory plate with two black switches on it. Presumably the
controls for door and window....

Barney went over, gingerly touched the one on the right, watching the
window; then flicked up the switch. Instantly, the window had
vanished, the wood paneling again covered the wall. Barney turned the
switch down. The window was back.