"And the young woman of the house," asked Dr. Hood, with huge and silent amusement, "what does she want?"
"Why, she wants to marry him," cried Father Brown, sitting up eagerly. "That is just the awful complication."
"It is indeed a hideous enigma," said Dr. Hood.
"This young James Todhunter," continued the cleric, "is a very decent man so far as I know; but then nobody knows very much. He is a bright, brownish little fellow, agile like a monkey, clean-shaven like an actor, and obliging like a born courtier. He seems to have quite a pocketful of money, but nobody knows what his trade is. Mrs. MacNab, therefore (being of a pessimistic turn), is quite sure it is something dreadful, and probably connected with dynamite. The dynamite must be of a shy and noiseless sort, for the poor fellow only shuts himself up for several hours of the day and studies something behind a locked door. He declares his privacy is temporary and justified, and promises to explain before the wedding. That is all that anyone knows for certain, but Mrs. MacNab will tell you a great deal more than even she is certain of. You know how the tales grow like grass on such a patch of ignorance as that. There are tales of two voices heard talking in the room; though, when the door is opened, Todhunter is always found alone. There are tales of a mysterious tall man in a silk hat, who once came out of the sea-mists and apparently out of the sea, stepping softly across the sandy fields and through the small back garden at twilight, till he was heard talking to the lodger at his open window. The colloquy seemed to end in a quarrel. Todhunter dashed down his window with violence, and the man in the high hat melted into the sea-fog again. This story is told by the family with the fiercest mystification; but I really think Mrs. MacNab prefers her own original tale: that the Other Man (or whatever it is) crawls out every night from the big box in the corner, which is kept locked all day. You see, therefore, how this sealed door of Todhunter's is treated as the gate of all the fancies and monstrosities of the Thousand and One Nights. And yet there is the little fellow in his respectable black jacket, as punctual and innocent as a parlour clock. He pays his rent to the tick; he is practically a teetotaller; he is tirelessly kind with the younger children, and can keep them amused for a day on end; and, last and most urgent of all, he has made himself equally popular with the eldest daughter, who is ready to go to church with him to-morrow."
A man warmly concerned with any large theories has always a relish for applying them to any triviality. The great specialist having condescended to the priest's simplicity, condescended expansively. He settled himself with comfort in his arm-chair and began to talk in the tone of a somewhat absent-minded lecturer:
"Even in a minute instance, it is best to look first to the main tendencies of Nature. A particular flower may not be dead in early winter, but the flowers are dying; a particular pebble may never be wetted with the tide, but the tide is coming in. To the scientific eye all human history is a series of collective movements, destructions or migrations, like the massacre of flies in winter or the return of birds in spring. Now the root fact in all history is Race. Race produces religion; Race produces legal and ethical wars. There is no stronger case than that of the wild, unworldly and perishing stock which we commonly call the Celts, of whom your friends the MacNabs are specimens. Small, swarthy, and of this dreamy and drifting blood, they accept easily the superstitious explanation of any incidents, just as they still accept (you will excuse me for saying) that superstitious explanation of all incidents which you and your Church represent. It is not remarkable that such people, with the sea moaning behind them and the Church (excuse me again) droning in front of them, should put fantastic features into what are probably plain events. You, with your small parochial responsibilities, see only this particular Mrs. MacNab, terrified with this particular tale of two voices and a tall man out of the sea. But the man with the scientific imagination sees, as it were, the whole clans of MacNab scattered over the whole world, in its ultimate average as uniform as a tribe of birds. He sees thousands of Mrs. MacNabs, in thousands of houses, dropping their little drop of morbidity in the tea-cups of their friends; he sees——"
Before the scientist could conclude his sentence, another and more impatient summons sounded from without; someone with swishing skirts was marshalled hurriedly down the corridor, and the door opened on a young girl, decently dressed but disordered and red-hot with haste. She had sea-blown blonde hair, and would have been entirely beautiful if her cheek-bones had not been, in the Scotch manner, a little high in relief as well as in colour. Her apology was almost as abrupt as a command.
"I'm sorry to interrupt you, sir," she said, "but I had to follow Father Brown at once; it's nothing less than life or death."
Father Brown began to get to his feet in some disorder. "Why, what has happened, Maggie?" he said.
"James has been murdered, for all I can make out," answered the girl, still breathing hard from her rush. "That man Glass has been with him again; I heard them talking through the door quite plain. Two separate voices: for James speaks low, with a burr, and the other voice was high and quavery."
"That man Glass?" repeated the priest in some perplexity.
"I know his name is Glass," answered the girl, in great impatience. "I heard it through the door. They were quarrelling—about money, I think—for I heard James say again and again, 'That's right, Mr. Glass,' or 'No, Mr. Glass,' and then, 'Two or three, Mr. Glass.' But we're talking too much; you must come at once, and there may be time yet."
"But time for what?" asked Dr. Hood, who had been studying the young lady with marked interest. "What is there about Mr. Glass and his money troubles that should impel such urgency?"
"I tried to break down the door and couldn't," answered the girl shortly, "Then I ran to the back-yard, and managed to climb on to the window-sill that looks into the room. It was all dim, and seemed to be empty, but I swear I saw James lying huddled up in a corner, as if he were drugged or strangled."
"This is very serious," said Father Brown, gathering his errant hat and umbrella and standing up; "in point of fact I was just putting your case before this gentleman, and his view——"
"Has been largely altered," said the scientist gravely. "I do not think this young lady is so Celtic as I had supposed. As I have nothing else to do, I will put on my hat and stroll down town with you."
In a few minutes all three were approaching the dreary tail of the MacNabs' street: the girl with the stern and breathless stride of the mountaineer, the criminologist with a lounging grace (which was not without a certain leopard-like swiftness), and the priest at an energetic trot entirely devoid of distinction. The aspect of this edge of the town was not entirely without justification for the doctor's hints about desolate moods and environments. The scattered houses stood farther and farther apart in a broken string along the seashore; the afternoon was closing with a premature and partly lurid twilight; the sea was of an inky purple and murmuring ominously. In the scrappy back garden of the MacNabs which ran down towards the sand, two black, barren-looking trees stood up like demon hands held up in astonishment, and as Mrs. MacNab ran down the street to meet them with lean hands similarly spread, and her fierce face in shadow, she was a little like a demon herself. The doctor and the priest made scant reply to her shrill reiterations of her daughter's story, with more disturbing details of her own, to the divided vows of vengeance against Mr. Glass for murdering, and against Mr. Todhunter for being murdered, or against the latter for having dared to want to marry her daughter, and for not having lived to do it. They passed through the narrow passage in the front of the house until they came to the lodger's door at the back, and there Dr. Hood, with the trick of an old detective, put his shoulder sharply to the panel and burst in the door.
It opened on a scene of silent catastrophe. No one seeing it, even for a flash, could doubt that the room had been the theatre of some thrilling collision between two, or perhaps more, persons. Playing-cards lay littered across the table or fluttered about the floor as if a game had been interrupted. Two wine glasses stood ready for wine on a side-table, but a third lay smashed in a star of crystal upon the carpet. A few feet from it lay what looked like a long knife or short sword, straight, but with an ornamental and pictured handle, its dull blade just caught a grey glint from the dreary window behind, which showed the black trees against the leaden level of the sea. Towards the opposite corner of the room was rolled a gentleman's silk top hat, as if it had just