IIFOR A MOMENT OF STARTLED horror we stood motionless. The floating little flame seemed bounding now, just over the rocks. Bounding? Abruptly I seemed to see a dark shape of solidity under it—something almost, but not quite invisible in the blackness. A tangible thing? A creature—burning? Thoughts are instant things. I recall that in that second, I had the impression of a four-legged thing like a huge dog, bounding toward us over the rocks. The flame in which it was enveloped, had spread—it was a blob of flame, but solidity was there. All in a second. My little electro-gun was in my hand. And then from beside me, Torrence fired—his flash with a whining sizzle splitting the blackness of the gully with its pencil-point of hurled electrons. His hasty aim quite evidently was wild. I saw the l