We set the ladders in place. Olaf I assigned to stand before the door and watch for the first signs of its opening⁠—if open it should. The Becquerels were set within three-inch tripods, whose feet I had equipped with vacuum rings to enable them to hold fast to the rock.

I scaled one ladder and fastened a condenser over the boss; descended; sent Larry up to watch it, and, ascending the second ladder, rapidly fixed the other in its place. Then, with O’Keefe watchful on his perch, I on mine, and Olaf’s eyes fixed upon the moon door, we began our vigil. Suddenly there was an exclamation from Larry.

“Seven little lights are beginning to glow on this stone!” he cried.

But I had already seen those beneath my lens begin to gleam out with a silvery lustre. Swiftly the rays within the condenser began to thicken and increase, and as they did so the seven small circles waxed like stars growing out of the dusk, and with a queer⁠—curdled is the best word I can find to define it⁠—radiance entirely strange to me.