"We mustn't be too hard on either of them," said Father Brown. "Other English gentlemen have stolen before now, and been covered by legal and political protection; and the West also has its own way of covering theft with sophistry. After all, the ruby is not the only kind of valuable stone in the world that has changed owners; it is true of other precious stones; often carved like cameos and coloured like flowers."

The other looked at him inquiringly; and the priest's finger was pointed to the Gothic outline of the great Abbey.

"A great graven stone," he said, "and that was also stolen."

VIII
THE CHIEF MOURNER OF MARNE

A BLAZE of lightning blanched the grey woods tracing all the wrinkled foliage down to the last curled leaf, as if every detail were drawn in silverpoint or graven in silver. The same strange trick of lightning by which it seems to record millions of minute things in an instant of time, picked out everything, from the elegant litter of the picnic spread under the spreading tree to the pale lengths of winding road, at the end of which a white car was waiting. In the distance a melancholy mansion with four towers like a castle, which in the grey evening had been but a dim and distant huddle of walls like a crumbling cloud, seemed to spring into the foreground, and stood up with all its embattled, roofs and blank and staring windows. And in this, at least, the light had something in it of revelation. For to some of those grouped under the tree that castle was, indeed, a thing faded and almost forgotten, which was to prove its power to spring up again in the foreground of their lives.

The light also clothed for an instant, in the same silver splendour, at least one human figure that stood up as motionless as one of the towers. It was that of a tall man standing on a rise of ground above the rest, who were mostly sitting on the grass or stooping to gather up the hamper and crockery. He wore a picturesque short cloak or cape clasped with a silver clasp and chain, which blazed like a star when the flash touched it; and something metallic in his motionless figure was emphasized by the fact that his closely-curled hair was of the burnished yellow that can be really called gold; and had the look of being younger than his face, which was handsome in a hard aquiline fashion, but looked, under the strong light, a little wrinkled and withered. Possibly it had suffered from wearing a mask of make-up, for Hugo Romaine was the greatest actor of his day. For that instant of illumination the golden curls and ivory mask and silver ornament made his figure gleam like that of a man in armour; the next instant his figure was a dark and even black silhouette against the sickly grey of the rainy evening sky.

But there was something about its stillness, like that of a statue, that distinguished it from the group at his feet. All the other figures around him had made the ordinary involuntary movement at the unexpected shock of light; for though the skies were rainy it was the first flash of the storm. The only lady present, whose air of carrying grey hair gracefully, as if she were really proud of it, marked her a matron of the United States, unaffectedly shut her eyes and uttered a sharp cry. Her English husband, General Outram, a very stolid Anglo-Indian, with a bald head and black moustache and whiskers of antiquated pattern, looked up with one stiff movement and then resumed his occupation of tidying up. A young man of the name of Mallow, very big and shy, with brown eyes like a dog's, dropped a cup and apologized awkwardly. A third man, much more dressy, with a resolute head, like an inquisitive terrier's, and grey hair brushed stiffly back, was no other than the great newspaper proprietor, Sir John Cockspur; he cursed freely, but not in an English idiom or accent, for he came from Toronto. But the tall man in the short cloak stood up literally like a statue in the twilight; his eagle face under the full glare had been like the bust of a Roman Emperor, and the carved eyelids had not moved.

A moment after, the dark dome cracked across with thunder, and the statue seemed to come to life. He turned his head over his shoulder and said casually:

"About a minute and half between the flash and the bang, but I think the storm's coming nearer. A tree is not supposed to be a good umbrella for the lightning, but we shall want it soon for the rain. I think it will be a deluge."

The young man glanced at the lady a little anxiously and said: "Can't we get shelter anywhere? There seems to be a house over there."