Wilks went out through the ports—a process of no more than a minute. I wandered away again through the corridors.
I suppose it was half an hour later that I chanced to be gazing through a corridor window. The lights along the rocky cliff were tiny blue spots. The head of the stairway leading down to the abyss of the crater floor was visible. The bloated figure of Wilks was just coming up. I watched him for a moment making his rounds. He did not stop to inspect the lights. That was routine. I thought it odd that he passed them.
Another minute passed. The figure of Wilks went with slow bounds over toward the back of the ledge where the glassite shelter housed the treasure. It was all dark off there. Wilks went into the gloom, but before I lost sight of him, he came back. As though he had changed his mind, he headed for the foot of the staircase which led up the cliff to where, at the peak of the little crater, five hundred feet above us, the narrow observatory was perched. He climbed with easy bounds, the light on his helmet bobbing in the gloom.
I stood watching. I could not tell why there seemed to be something queer about Wilks' actions. But I was struck with it, nevertheless. I watched him disappear over the summit.
Another minute went by. Wilks did not reappear. I thought I could make out his light on the platform up there. Then abruptly a tiny white beam was waving from the observatory platform! It flashed once or twice, then was extinguished. And now I saw Wilks plainly, standing in the Earthlight, gazing down.
Queer actions! Had the Earthlight touched him? Or was that a local signal call which he sent out? Why should Wilks be signaling? What was he doing with a hand helio? Our watchmen, I knew, had no reason to carry one.
And to whom could Wilks be signaling? To whom, across this Lunar desolation? The answer stabbed at me: to Miko's band!
I waited less than a moment. No further light. Wilks was still up there!
I went back to the lock entrance. Spare helmets and suits were here beside the keeper. He gazed at me inquiringly.
"I'm going out, Franck. Just for a minute." It struck me that perhaps I was a meddlesome fool. Wilks, of all of Grantline's men, was, I knew, most in his commander's trust. The signal could have been some part of this night's ordinary routine, for all I knew.