The priest had snatched a day from his business at Glasgow to meet his friend Flambeau, the amateur detective, who was at Glengyle Castle with another more formal officer investigating the life and death of the late Earl of Glengyle. That mysterious person was the last representative of a race whose valour, insanity, and violent cunning had made them terrible even among the sinister nobility of their nation in the sixteenth century. None were deeper in that labyrinthine ambition, in chamber within chamber of that palace of lies that was built up around Mary Queen of Scots.

The rhyme in the country-side attested the motive and the result of their machinations candidly:

As green sap to the simmer trees

Is red gold to the Ogilvies.

For many centuries there had never been a decent lord in Glengyle Castle; and with the Victorian era one would have thought that all eccentricities were exhausted. The last Glengyle, however, satisfied his tribal tradition by doing the only thing that was left for him to do; he disappeared. I do not mean that he went abroad; by all accounts he was still in the castle, if he was anywhere. But though his name was in the church register and the big red Peerage, nobody ever saw him under the sun.

If anyone saw him it was a solitary man-servant, something between a groom and a gardener. He was so deaf that the more business-like assumed him to be dumb; while the more penetrating declared him to be half-witted. A gaunt, red-haired labourer, with a dogged jaw and chin, but quite blank blue eyes, he went by the name of Israel Gow, and was the one silent servant on that deserted estate. But the energy with which he dug potatoes, and the regularity with which he disappeared into the kitchen gave people an impression that he was providing for the meals of a superior, and that the strange earl was still concealed in the castle. If society needed any further proof that he was there, the servant persistently asserted that he was not at home. One morning the provost and the minister (for the Glengyles were Presbyterian) were summoned to the castle. There they found that the gardener, groom and cook had added to his many professions that of an undertaker, and had nailed up his noble master in a coffin. With how much or how little further inquiry this odd fact was passed, did not as yet very plainly appear; for the thing had never been legally investigated till Flambeau had gone north two or three days before. By then the body of Lord Glengyle (if it was the body) had lain for some time in the little churchyard on the hill.

As Father Brown passed through the dim garden and came under the shadow of the chateau, the clouds were thick and the whole air damp and thundery. Against the last stripe of the green-gold sunset he saw a black human silhouette; a man in a chimney-pot hat, with a big spade over his shoulder. The combination was queerly suggestive of a sexton; but when Brown remembered the deaf servant who dug potatoes, he thought it natural enough. He knew something of the Scotch peasant; he knew the respectability which might well feel it necessary to wear "blacks" for an official inquiry; he knew also the economy that would not lose an hour's digging for that. Even the man's start and suspicious stare as the priest went by were consonant enough with the vigilance and jealousy of such a type.

The great door was opened by Flambeau himself, who had with him a lean man with iron-grey hair and papers in his hand: Inspector Craven from Scotland Yard. The entrance hall was mostly stripped and empty; but the pale, sneering faces of one or two of the wicked Ogilvies looked down out of black periwigs and blackening canvas.

Following them into an inner room, Father Brown found that the allies had been seated at a long oak table, of which their end was covered with scribbled papers, flanked with whisky and cigars. Through the whole of its remaining length it was occupied by detached objects arranged at intervals; objects about as inexplicable as any objects could be. One looked like a small heap of glittering broken glass. Another looked like a high heap of brown dust. A third appeared to be a plain stick of wood.

"You seem to have a sort of geological museum here," he said, as he sat down, jerking his head briefly in the direction of the brown dust and the crystalline fragments.

"Not a geological museum," replied Flambeau; "say a psychological museum."

"Oh, for the Lord's sake," cried the police detective laughing, "don't let's begin with such long words."

"Don't you know what psychology means?" asked Flambeau with friendly surprise. "Psychology means being off your chump."

"Still I hardly follow," replied the official.

"Well," said Flambeau, with decision, "I mean that we've only found out one thing about Lord Glengyle. He was a maniac."

The black silhouette of Gow with his top hat and spade passed the window, dimly outlined against the darkening sky. Father Brown stared passively at it and answered:

"I can understand there must have been something odd about the man, or he wouldn't have buried himself alive—nor been in such a hurry to bury himself dead. But what makes you think it was lunacy?"

"Well," said Flambeau, "you just listen to the list of things Mr. Craven has found in the house."

"We must get a candle," said Craven, suddenly. "A storm is getting up, and it's too dark to read."

"Have you found any candles," asked Brown smiling, "among your oddities?"

Flambeau raised a grave face, and fixed his dark eyes on his friend.

"That is curious, too," he said. "Twenty-five candles, and not a trace of a candlestick."

In the rapidly darkening room and rapidly rising wind, Brown went along the table to where a bundle of wax candles lay among the other scrappy exhibits. As he did so he bent accidentally over the heap of red-brown dust; and a sharp sneeze cracked the silence.

"Hullo!" he said, "snuff!"

He took one of the candles, lit it carefully, came back and stuck it in the neck of the whisky bottle. The unrestful night air, blowing through the crazy window, waved the long flame like a banner. And on every side of the castle they could hear the miles and miles of black pine wood seething like a black sea around a rock.

"I will read the inventory," began Craven gravely, picking up one of the papers, "the inventory of what we found loose and unexplained in the castle. You are to understand that the place generally was dismantled and neglected; but one or two rooms had plainly been inhabited in a simple but not squalid style by somebody; somebody who was not the servant Gow. The list is as follows:

"First item. A very considerable hoard of precious stones, nearly all diamonds, and all of them loose, without any setting whatever. Of course, it is natural that the Ogilvies should have family jewels; but those are exactly the jewels that are almost always set in particular articles of ornament. The Ogilvies would seem to have kept theirs loose in their pockets, like coppers.

"Second item. Heaps and heaps of loose snuff, not kept in a horn, or even a pouch, but lying in heaps on the mantelpieces, on the sideboard, on the piano, anywhere. It looks as if the old gentleman would not take the trouble to look in a pocket or lift a lid.

"Third item. Here and there about the house curious little heaps of minute pieces of metal, some like steel springs and some in the form of microscopic wheels. As if they had gutted some mechanical toy.

"Fourth item. The wax candles, which have to be stuck in bottle necks because there is nothing else to stick them in. Now I wish you to note how very much queerer all this is than anything we anticipated. For the central riddle we are prepared; we have all seen at a glance that there was something wrong about the last earl. We have come here to find out whether he really lived here, whether he really died here, whether that red-haired scarecrow who did his burying had anything to do with his dying. But suppose the worst in all this, the most lurid or melodramatic solution you like. Suppose the servant really killed the master, or suppose the master isn't really dead, or suppose the master is dressed up as the servant, or suppose the servant is buried for the master; invent what Wilkie Collins' tragedy you like, and you still have not explained a candle without a candlestick, or why an elderly gentleman of good family should habitually spill snuff on the piano. The core of the tale we could imagine; it is the fringes that are mysterious. By no stretch of fancy can the human mind connect together snuff and diamonds and wax and loose clockwork."