Don made no immediate answer to this. His attention seemed to be fully taken up with negotiating the slope of loose rock they were traversing at the moment. It was a section practically impossible to cross without leaving prominent traces, and he had been a little puzzled at his father’s going this way until he realized that the idea was probably to permit a check on any trailers as they returned. Once across the treacherous stuff and angling back down the slope, he finally spoke.

“You said a while back, Dad, that we were the reasons you didn’t make public this source of metal. It seems to me that even that shouldn’t have carried weight while the war was on — it might have been better to let the government develop the find and use it. I don’t mean that I don’t appreciate getting a college education, but — well—” he paused a little uncomfortably.

“You have a point, son, and that was another matter for thought when the war started, with you in high school and Billy just learning to walk. I think I might have done as you suggest, except for the fact that the most probable result of publicity would be to remove the source of metal. Just be patient a little longer — we’ll be there in a few minutes, and you will see for yourself.”

Donald nodded acceptance of this, and they proceeded in silence for a short time. The course Mr. Wing was following had led them into a narrow gully after crossing the scree; now he turned up this, making his way easily along the bank of the tiny brook which flowed down its center. After some ten minutes’ climb the trees began to thin out, and a few more rods found them on practically bare rock. This extended for some distance above them, but the older man seemed to have no desire to get to the top of the hill.

Instead, he turned again, moving quickly across the bare rock as though a path were plainly marked before him; and in a few steps reached the edge of a shallow declivity which appeared to have acted as a catch basin for rocks which had rolled from farther up the hill. Winding his way among these, with Donald close at his heels, he finally stopped and moved to one side, permitting his son to see what lay before them.

It was an almost featureless structure of metal, roughly cubical in shape and a little less than a yard on each edge. There was a small opening on one side, containing a single projection which had the appearance of a toggle switch. Several bolt heads of quite conventional appearance were also visible on different parts of the surface.

After allowing his son to look the object over for a few moments, Mr. Wing took a small screwdriver from his pocket and set to work on the bolts, which seemed very loose. Don, lacking tools, tried a few of the projecting heads with his fingers and had little difficulty with them; in two or three minutes, the older man was able to remove several metal plates and expose the interior of the block to view. Don looked, and whistled.

“What is it, Dad? Not an ordinary radio, certainly!”

“No. It seems to be a radio of some sort, however. I don’t know what sort of wave it uses, or its range, or its power source — though I have some ideas about the last two. There’s nothing to using it; I imagine the makers wanted that to be easy, and there is only the single control switch. I’m not so sure that the interior was meant to be so accessible.”

“But where did it come from? Who made it? How did you get hold of it?”