“It was Stanton who discovered the moon rock. We had been inspecting the inner courtyard; Edith and Thora were getting together our lunch. I came out of the vault of Chau-te-leur to find Stanton before a part of the terrace studying it wonderingly.

“ ‘What do you make of this?’ he asked me as I came up. He pointed to the wall. I followed his finger and saw a slab of stone about fifteen feet high and ten wide. At first all I noticed was the exquisite nicety with which its edges joined the blocks about it. Then I realized that its colour was subtly different⁠—tinged with grey and of a smooth, peculiar⁠—deadness.

“ ‘Looks more like calcite than basalt,’ I said. I touched it and withdrew my hand quickly for at the contact every nerve in my arm tingled as though a shock of frozen electricity had passed through it. It was not cold as we know cold. It was a chill force⁠—the phrase I have used⁠—frozen electricity⁠—describes it better than anything else. Stanton looked at me oddly.