"Don't tell him what it's for until you get him outside," hastily counselled the butler as the policeman's wife was departing on her errand. "Sir Philip won't like it if he hears that what happened to-night was discussed in the Fox tap-room."

The little clock on the mantelpiece had barely ticked off five additional minutes when Mrs. Lumbe returned in a breathless state, accompanied by a young man with billiard chalk on his coat and hands.

"This is my brother, Detective Caldew," said Mrs. Lumbe, between pants, to the butler. "I told him about the murder, and we hurried back as fast as we could."

"It's a horrible crime, and we must lose no time while there is still a chance of catching the murderer," said the young man, regaining his breath more easily than his stout sister. He brushed the billiard chalk off his clothes as he spoke. "Let us go at once."

Tufnell cast a curious glance at the new-comer. He saw a man of about thirty-five, tall, well-built and dark, with a clean-shaven face and rather intelligent eyes under thick dark brows. He had some difficulty in recognizing Detective Caldew as the village urchin of a score of years before who had touched his cap to the moat-house butler as a great personage, second only in importance to Sir Philip Heredith himself.

Tufnell was not aware that in the former village boy who had become a London detective he was in the presence of a young man of soaring ambition. Caldew had gone to London fifteen years before with the idea of bettering himself. After tramping the streets of the metropolis for some months in a vain quest for work, he had enlisted in the metropolitan police force rather than return to his native village and report himself a failure. At the end of two years' service as a policeman he had been given the choice of transfer to the Criminal Investigation Department of Scotland Yard. He had gladly accepted the opportunity, and had shown so much apt.i.tude for plain-clothes work that by the end of another two years he had risen to the rank of detective. Caldew thought he was on the rapid road to further promotion, and had married on the strength of that belief. But another ten years had pa.s.sed since then, and he still occupied a subordinate position, with not much hope of promotion unless luck came his way. And there seemed very little chance of that. Caldew's professional experience had imbued him with the belief that the junior officers of Scotland Yard existed for no other purpose than to shoulder the blame for the mistakes of their official superiors, who divided amongst themselves the plums of promotion, rewards, and newspaper publicity. That, of course, was the recognized thing in all public departments. Caldew found no fault with the system. His great ambition was to obtain some opening which would bring him advancement and his share of the plums.

He believed his opportunity had arrived that night. It had always been his dream to have the chance to unravel single-handed some great crime-a murder for choice-in which he alone should have all the glory and praise and newspaper paragraphs. He determined to make the most of the lucky chance which had fallen into his hands, before anybody else could arrive on the scene. He had confidence in his own abilities, and thought he had all the qualifications necessary to make a great detective. He was, at all events, sufficiently acute to realize that opportunity seldom knocks twice at any man's door.

The three men set out for the moat-house. At the butler's request Sergeant Lumbe went ahead to summon the doctor, who lived on the other side of the village green, and while he was gone Caldew drew the details of the crime from his companion. Lumbe rejoined them at the footbridge which led across the meadows into the Heredith estate, and they proceeded on their way in silence. Sergeant Lumbe's brain-such as it was-was in too much of a whirl to permit him to talk coherently; Tufnell, habitually a taciturn individual, had been rendered more so than usual by the events of the night; and Caldew was plunged into such a reverie of pleasurable expectation, regarding the outcome of his investigations of the moat-house murder, that the stages of his promotion through the grades of detective, sub-superintendent, and superintendent, flashed through his mind as rapidly as telegraph poles flit past a traveller in a railway carriage. The crime which had struck down one human being in the dawn of youth and beauty, turned another into a murderer, and plunged an old English family into horror and misery, afforded Detective Caldew's optimistic temperament such extreme gratification that he could scarcely forbear from whistling aloud. But that is human nature.

They pa.s.sed through the wood, and crossed the moat bridge. The mist was creeping out of the darkness on both sides of the moat-house, casting a film across the faint light which gleamed from one or two of the heavily shuttered windows. Caldew, pausing midway on the bridge to glance at the mist-spirals stealing up like a troop of ghosts, asked his brother-in-law if the moat was still kept full of water. He received an affirmative reply, and walked on again.

A maidservant answered Tufnell's ring at the front door, and informed him in a whisper that Sir Philip and Miss Heredith were in the drawing-room. Thither they bent their steps, and found Musard awaiting them near the door. He nodded to Sergeant Lumbe, whom he knew, and glanced interrogatively at Caldew. Lumbe announced the latter's ident.i.ty.

"You had better come in here first," said Musard, opening the door of the drawing-room and revealing the baronet and Miss Heredith sitting within. Brother and sister glanced at the group entering the room.

"This is Detective Caldew, of Scotland Yard," Musard explained to them, indicating the young man. "He is staying with Lumbe, who thought it advisable to bring him."

"Have you told them everything?" Miss Heredith spoke to Tufnell. Her dry lips formed the words rather than uttered them, but the old retainer understood her, and bowed without speaking. "What do you wish to do first, Detective Caldew?" she added, turning to him, and speaking with more composure. She was quick to realize that he would take the lead in the police investigations. A glance at Sergeant Lumbe's fl.u.s.tered face revealed only too clearly that the position in which he found himself was beyond his official capabilities.

Caldew stepped briskly forward. He was in no way embarra.s.sed by his unaccustomed surroundings or by the commanding appearance of the great lady who was addressing him. He was a man who believed in himself, and such men are too much in earnest to be diffident.

"I should like to ask a few questions first, madam," he said. "So far, I have heard only your butler's version of what happened." Without waiting for a reply he launched a number of questions, and made a note of the replies in a pocket-book.

Musard, who a.s.sisted Miss Heredith to answer the questions, was rather impressed by the quick intelligence the detective displayed in eliciting all the known facts of the murder, but Sergeant Lumbe, who remained standing near the door, was shocked to hear Caldew cross-questioning the great folk of the moat-house with such little ceremony. He thought his brother-in-law a very forward young fellow, and hoped that Miss Heredith would not hold him responsible for his free-and-easy manner.

"Now I should like to commence my investigations," said Caldew, replacing his pocket-book. "There has been too much time lost already. I will start with examining the room where the body is, if you please."

"Certainly." Miss Heredith rose from her seat as she uttered the word.

"My dear Alethea!"-Musard's tone was expostulatory-"I will take the detective upstairs. There is no need for you to come."

"I prefer to do so." Miss Heredith's tone admitted of no further argument. She was about to lead the way from the room when she paused and glanced at Tufnell. "When will Dr. Holmes be here?" she asked.

"Almost immediately, ma'am."

"You had better stay here and receive him, Philip." Miss Heredith placed her hand affectionately on her brother's shoulder. He had not spoken during the time the police were in the room, but had sat quietly on his chair, with bent head and clasped hands, looking very old and frail. "It will be as well for him to see Phil before going upstairs," she added.

Sir Philip looked up at the mention of his son's name. "Poor Phil," he muttered dully.

"I think the doctor should examine Phil the moment he comes," continued Miss Heredith, aside, to Musard. "His look alarms me. I fear the shock has affected his brain. Tufnell, be sure and show Dr. Holmes to Mr. Philip's room directly Sir Philip has received him."

"You can rely upon me to do so, ma'am," said Tufnell earnestly.

"Very well. We will now go upstairs."

She left the drawing-room and proceeded towards the broad oak staircase, with Musard close behind her. Detective Caldew followed more slowly, noting his surroundings. When they reached the head of the staircase Miss Heredith switched on the electric current, and the bedroom corridor sprang into light. Detective Caldew was surprised at its length.

"Where does this pa.s.sage lead to?" he asked abruptly.

"To the south side of the moat-house," replied Musard.

"Has it any outlet?"

"Yes; a door at the end communicates with a narrow staircase, leading to another door at the bottom. The second door was a former back entrance-it opens somewhere near the servants' quarters, I think?" He glanced inquiringly at Miss Heredith.

"Those stairs are never used now," she replied. "The entrance door at the bottom of the staircase is kept locked."

"There are such things as skeleton keys," commented the detective.

Musard opened the door of the death-chamber and switched on the light. Caldew walked at once to the bedside. He drew away the covering which had been placed over the face of the young wife, and stood looking at her.

Death had invested her with pathos, but not with dignity. On the pallor of the death mask the tinted lips, the spots of rouge, the pencilled eyebrows of the dead face, were as clearly revealed as print on a white page. The lips were parted; the small white teeth were showing beneath the upper lip. The little nose rose in the sharp outline of death; between the half-closed eyelids the darkened blue eyes looked out vacantly. The thick, fair hair, spotted with blood, flowed in disordered waves over the white pillow; the numerous rings on the dead hands blazed and glittered with hard brilliance in the electric light.

It was these costly jewels on the murdered girl's hands which prompted the question which sprang to the detective's lips:

"Did the murderer take anything?" he asked. "Has anything been missed?"

"No," said Miss Heredith. "Nothing has been taken."

"Mrs. Heredith had more jewellery than this, I suppose?" pursued the detective. "Brooches and necklaces, and that kind of thing. Where were they kept?"

"Mrs. Heredith's jewel-case is downstairs, in the safe in the library," replied Miss Heredith. She did not feel called upon to add the additional information that she had taken it there herself, and locked it up, not half an hour before.

Detective Caldew made a mental note of the fact that the motive for the crime was not robbery, unless, indeed, the murderer had become flurried, and fled. His eye, glancing round the room, was attracted by the window curtains, which were stirring faintly. He flung them back, and saw the open window.

"How long has this window been open?" he asked.

Miss Heredith gave her reasons for believing that the window was closed when she left Violet to go downstairs to the dining-room. Caldew listened thoughtfully, and nodded his head in quick comprehension when she added the information that the bedroom window was nearly twenty feet from the ground.

"You think the murderer did not jump out of the window," he said. "The more important point is, did he get in that way? It is not a difficult matter to scale a wall to reach a window if there is any sort of a foothold. It is a point I will look into afterwards."

He tried the window catch, and then walked about the room, examining it closely. His quick, eager eyes, looking about in every direction, were caught by something glittering on the carpet, close to the bed. He glanced at his companions. As a detective, he had long learnt the wisdom of caution in the presence of friends and relatives.

"I should like to be left alone in the room in order to examine it more thoroughly," he briefly announced.

When Miss Heredith and Musard had left the room he locked the door behind them, and, kneeling down by the bedside, disentangled a small shining object almost concealed in the thick green texture of the carpet. It was a trinket like a bar brooch, with gold clasps. The bar was of transparent stone, clear as gla.s.s, with a faint sea-green tinge, and speckled in the interior with small black spots. Caldew had never seen a stone like it. The frail gold of the setting suggested that it was not of much intrinsic value, but it was a pretty little trinket, such as ladies sometimes wear as a mascot. Caldew reflected that if it were a mascot it was by no means certain that the owner was a woman. Many young officers took mascots to the front for luck.

As he turned it over in his hand he observed some lettering on the underside. He examined it curiously, and saw that an inscription had been scratched into the stone in round, irregular handwriting-obviously an unskilled, almost childish effort. Holding the brooch closer to the light, he was able to decipher the inscription. It consisted of two words-"Semper Fidelis."

It seemed to Caldew that the inscription rather weakened the correctness of his first impression that the trinket had been worn as a feminine mascot. He doubted very much whether any modern woman would cherish a mid-Victorian sentiment like "Always Faithful." On the other hand, many men might. His experience as a detective had led him to the belief that men were more p.r.o.ne to such sentiments than the other s.e.x, though their conduct rarely accorded with their protestations and temporary intentions.

Struck by a sudden thought, he dropped the trinket back on the carpet. It was just visible in the thick pile.