Flambeau was plainly in a mood to break down the door with his big shoulders; but the Scotchman, with more reason, if less intuition, fumbled about on the frame of the door till he found the invisible button; and the door swung slowly open.
It showed substantially the same serried interior; the hall had grown darker, though it was still struck here and there with the last crimson shafts of sunset, and one or two of the headless machines had been moved from their places for this or that purpose, and stood here and there about the twilit place. The green and red of their coats were all darkened in the dusk; and their likeness to human shapes slightly increased by their very shapelessness. But in the middle of them all, exactly where the paper with the red ink had lain, there lay something that looked like red ink spilt out of its bottle. But it was not red ink.
With a French combination of reason and violence Flambeau simply said "Murder!" and, plunging into the flat, had explored, every corner and cupboard of it in five minutes. But if he expected to find a corpse he found none. Isidore Smythe was not in the place, either dead or alive. After the most tearing search the two men met each other in the outer hall, with streaming faces and staring eyes. "My friend," said Flambeau, talking French in his excitement, "not only is your murderer invisible, but he makes invisible also the murdered man."Angus looked round at the dim room full of dummies, and in some Celtic corner of his Scotch soul a shudder started. One of the life-size dolls stood immediately overshadowing the blood stain, summoned, perhaps, by the slain man an instant before he fell. One of the high-shouldered hooks that served the thing for arms, was a little lifted, and Angus had suddenly the horrid fancy that poor Smythe's own iron child had struck him down. Matter had rebelled, and these machines had killed their master. But even so, what had they done with him?
"Eaten him?" said the nightmare at his ear; and he sickened for an instant at the idea of rent, human remains absorbed and crushed into all that acephalous clockwork.
He recovered his mental health by an emphatic effort, and said to Flambeau, "Well, there it is. The poor fellow has evaporated like a cloud and left a red streak on the floor. The tale does not belong to this world.""There is only one thing to be done," said Flambeau, "whether it belongs to this world or the other. I must go down and talk to my friend."They descended, passing the man with the pail, who again asseverated that he had let no intruder pass, down to the commissionaire and the hovering chestnut man, who rigidly reasserted their own watchfulness. But when Angus looked round for his fourth confirmation he could not see it, and called out with some nervousness, "Where is the policeman?""I beg your pardon," said Father Brown; "that is my fault. Ijust sent him down the road to investigate something--that Ijust thought worth investigating."
"Well, we want him back pretty soon," said Angus abruptly, "for the wretched man upstairs has not only been murdered, but wiped out.""How?" asked the priest.
"Father," said Flambeau, after a pause, "upon my soul I believe it is more in your department than mine. No friend or foe has entered the house, but Smythe is gone, as if stolen by the fairies.
If that is not supernatural, I--"
As he spoke they were all checked by an unusual sight; the big blue policeman came round the corner of the crescent, running. He came straight up to Brown.
"You're right, sir," he panted, "they've just found poor Mr.
Smythe's body in the canal down below."
Angus put his hand wildly to his head. "Did he run down and drown himself?" he asked.
"He never came down, I'll swear," said the constable, "and he wasn't drowned either, for he died of a great stab over the heart.""And yet you saw no one enter?" said Flambeau in a grave voice.
"Let us walk down the road a little," said the priest.
As they reached the other end of the crescent he observed abruptly, "Stupid of me! I forgot to ask the policeman something.
I wonder if they found a light brown sack."
"Why a light brown sack?" asked Angus, astonished.
