Pierce sprang to his feet with a resurrection of all the romantic abandon of his vow over the pig-sty.

"Impossible! "he cried. "You don't know what you're saying or how true it is. All I've done so far was possible and prosaic. But I will do an impossible thing. I will do something that is written in all books and rhymes as impossible—something that has passed into a proverb of the impossible. The war is not ended yet; and if you two fellows will post yourselves in the quarry opposite the Blue Boar, on Thursday week at sunset, you will see something so impossible and so self-evident that even the organs of public information will find it hard to hide it."

It was in that part of the steep fall of pine-wood where the quarry made a sort of ledge under a roof of pine that two gentlemen of something more than middle age who had not altogether lost the appetite of adventure posted themselves with all the preparations due to a picnic or a practical joke. It was from that place, as from a window looking across the valley, that they saw what seemed more like a vision; what seemed indeed rather like the parody of an apocalypse. The large clearance of the western sky was of a luminous lemon