"Did you ever see clearer footprints?" exclaimed the more practical-minded Galloway. "Look how deep they are near the edge of the pit, where the murderer braced himself to throw the body off his back into the hole. See! there is a spot of blood on the edge."
It was as he had said. The footprints were clear and distinct to the brink of the pit, but fainter as they turned away, showing that the man who had carried the body had stepped more lightly and easily after relieving himself of his terrible burden.
"I must take plaster casts of those prints before it rains," said Galloway. "They are far too valuable a piece of evidence to be lost. They form the final link in the case against Ronald."
"You regard the case as conclusive, then?" said Colwyn.
"Of course I do. It is now a simple matter to reconstruct the crime from beginning to end. Ronald got through Mr. Glenthorpe's window last night in the dark. As the catch has not been forced, he either found it unlocked or opened it with a knife. After getting into the room he walked towards the foot of the bed. He listened to make sure that Mr. Glenthorpe was asleep, and then struck the match I picked up near the foot of the bed, lit the candle he was carrying, put it on the table beside the bed, and stabbed the sleeping man. Having secured the money, he unlocked the door, carried the corpse out on his shoulder, closed the door behind him but did not lock it, then took the body downstairs, let himself out of the back door, carried it up here and cast it into the pit. That's how the murder was committed."
"I agree with you that the murderer entered through the window," said Colwyn. "But why did he do so? It strikes me as important to clear that up. If Ronald is the murderer, why did he take the trouble to enter the room from the outside when he slept in the next room?"
"Surely you have not forgotten that the door was locked from inside? Benson says Mr. Glenthorpe was in the habit of locking his door and sleeping with the key under the pillow. Ronald no doubt first tried to enter the room by the door, but, finding it locked, climbed out of his window, and got into the room through the other window. He dared not break open the door for fear of disturbing the inmate or alarming the house."
"Then how do you account for the key being found in the outside of Mr. Glenthorpe's door this morning?"
"Quite easily. During the struggle or in the victim's death convulsions the bed-clothes were disarranged, and Ronald saw the key beneath the pillow. Or he may have searched for it, as he knew he would need it before he could open the door and remove the body. It was easy for him to climb through the window to commit the murder, but he couldn't remove the body that way. After finding the key he unlocked the door, and put the key in the outside, intending to lock the door and remove the key as he left the room, so as to defer the discovery that Mr. Glenthorpe was missing until as long after his own departure in the morning as possible. He may have found it a difficult matter to stoop and lock the door and withdraw the key while he was encumbered with the corpse, so left it in the door till he returned from the pit. When he returned he was so exhausted with carrying the body several hundred yards, mostly uphill, that he forgot all about the key. That is my theory to account for the key being in the outside of the door."
"It's an ingenious one, at all events," commented Colwyn. "But would such a careful deliberate murderer overlook the key when he returned?"
"Nothing more likely," said the confident superintendent. "It's in trifles like this that murderers give themselves away. The notorious Deeming, who murdered several wives, and disposed of their bodies by burying them under hearthstones and covering them with cement, would probably never have been caught if he had not taken away with him a canary which belonged to the last woman he murdered. It was a clue that couldn't be missed—like the silk skein in Fair Rosamond's Bower."
"Here's another point: why did not Ronald, having disposed of the body, disappear at once, instead of waiting for the morning?"
"Because if his room had been found empty in the morning, as well as that of Mr. Glenthorpe's, the double disappearance would have aroused instant suspicion and search. Ronald gauged the moment of his departure very cleverly, in my opinion. On the one hand, he wanted to get away before the discovery of Mr. Glenthorpe's empty bedroom; and, on the other hand, he wished to stay at the inn long enough to suggest that he had no reason for flight, but was merely compelled to make an early departure. The trouble and risk he took to conceal the body outside prove conclusively that he thought the pit a sufficiently safe hiding-place to retard discovery of the crime for a considerable time, and he probably thought that even when it was discovered that Mr. Glenthorpe was missing his absence would not, at first, arouse suspicions that he had met with foul play.
"It was not as though Mr. Glenthorpe was living at home with relatives who would have immediately raised a hue and cry. He was a lonely old man living in an inn amongst strangers, who were not likely to be interested in his goings and comings. That suggests another alternative theory to account for the key in the door: Ronald may have left it in the door to convey the impression that Mr. Glenthorpe had gone out for an early walk. That belief would at least gain Ronald a few hours to make good his escape from this part of the country and get away by train before any suspicions were aroused. The fact that none of Mr. Glenthorpe's clothes were missing was not likely to be discovered in an inn until suspicion was aroused. Ronald laid his plans well, but how was he to know that in his path to the pit he walked over soil as plastic and impressionable as wax?"
"But in spite of that you assume he knew exactly where this pit was situated?"
"Nothing more likely. It is well-known to archaeologists. Ronald may well have heard of it while staying at Durrington, or he may have known of it personally through some previous visit to this part of the world. And there is also evidence that Mr. Glenthorpe told him of the hut circles and the pit during dinner last night."
"Just one more doubt, Superintendent. How do you account for the cracked gas globe and the broken incandescent mantle?"
"Ronald probably knocked his head against it as he approached the bed," said Galloway promptly.
"Hardly. Ronald's height, according to the description, is five feet ten inches. That happens to be also my height, and I can pass under the gas globe without touching it."
"Then it was broken when Ronald was carrying the corpse downstairs," replied Galloway, after a moment's reflection. "He carried the corpse on his shoulders and part of the body would be above his head."
"Superintendent Galloway has an answer for everything," said Colwyn with a smile, to Mr. Cromering. "He is persuasive if not always convincing."
"The case seems clear enough to me," said the chief constable thoughtfully. "Come, gentlemen, let us return to the inn. We have a number of things to do, and not much time to do them in."
CHAPTER VI
The inn, seen in the grey evening of a grey day, had a stark and sinister aspect, an atmosphere of mystery and secretiveness, an air of solitary aloofness in the dreary marshes, standing half shrouded in the night mists which were sluggishly crawling across the oozing flats from the sea. It was not a place where people could be happy—this battered abode of a past age on the edge of the North Sea, with the bitter waters of the marshes lapping its foundations, and the cold winds for ever wailing round its gaunt white walls.
The portion buried in the hillside, with only the tops of the windows peering above, suggested the hidden holes and burrowing byways of a dead and gone generation of smugglers