Most likely he only meant to buy those letters from Miss Pebmarsh. What happened, however, nobody can say but the murderer himself.

“Who knows? But the deed done, imagine the horror of a refined, aristocratic man, face to face with such a crime as that.

“Was it this terror, or merely rage at the girl who had been the original cause of all this, that prompted him to commit the final villainy of writing out a false accusation and placing it under the dead woman’s hand? Who can tell?

“Then, the deed done, and the mise-en-scène complete, he is able to catch the last train – 11.23 – back to town. A man travelling alone would pass practically unperceived.

“Pamela’s innocence was proved, and the murder of Miss Pebmarsh has remained a mystery, but if you will reflect on my conclusions, you will admit that no one else – no one else – could have committed that murder, for no one else had a greater interest in the destruction of those letters.”

VI

The Lisson Grove Mystery

1

The man in the corner ordered another glass of milk, and timidly asked for a second cheesecake at the same time.

“I am going down to the Marylebone Police Court, to see those people brought up before the ‘beak’,” he remarked.

“What people?” I queried.

“What people!” he exclaimed, in the greatest excitement. “You don’t mean to say that you have not studied the Lisson Grove Mystery?”

I had to confess that my knowledge on that subject was of the most superficial character.

“One of the most interesting cases that has cropped up in recent years,” he said, with an indescribable look of reproach.

“Perhaps. I did not study it in the papers because I preferred to hear you tell me all about it,” I said.

“Oh, if that’s it,” he replied, as he settled himself down in his corner like a great bird after the rain, “then you showed more sense than lady journalists usually possess. I can, of course, give you a far clearer account than the newspapers have done; as for the police – well! I never saw such a muddle as they are making of this case.”

“I dare say it is a peculiarly difficult one,” I retorted, for I am ever a champion of that hardworking department.

“H’m!” he said, “so, so – it is a tragedy in a prologue and three acts. I am going down this afternoon to see the curtain fall for the third time on what, if I mistake not, will prove a good burlesque; but it all began dramatically enough. It was last Saturday, 21st November, that two boys, playing in the little spinney just outside Wembley Park Station, came across three large parcels done up in American cloth.

“With the curiosity natural to their age, they at once proceeded to undo these parcels, and what they found so upset the little beggars that they ran howling through the spinney and the polo ground, straight as a dart to Wembley Park Station. Half-frantic with excitement, they told their tale to one of the porters off duty, who walked back to the spinney with them. The three parcels, in point of fact, contained the remains of a dismembered human body. The porter sent one of the boys for the local police, and the remains were duly conveyed to the mortuary, where they were kept for identification.

“Three days later – that is to say, on Tuesday, 24th November – Miss Amelia Dyke, residing at Lisson Grove Crescent, returned from Edinburgh, where she had spent three or four days with a friend. She drove up from St Pancras in a cab, and carried her small box up herself to the door of the flat, at which she knocked loudly and repeatedly – so loudly and so persistently, in fact, that the inhabitants of the neighbouring flats came out on to their respective landings to see what the noise was about.

“Miss Amelia Dyke was getting anxious. Her father, she said, must be seriously ill, or else why did he not come and open the door to her? Her anxiety, however, reached its culminating point when Mr and Mrs Pitt, who reside in the flat immediately beneath that occupied by the Dykes, came forward with the alarming statement that, as a matter of fact, they had themselves been wondering if anything were wrong with old Mr Dyke, as they had not heard any sound overhead for the last few days.

“Miss Amelia, now absolutely terrified, begged one of the neighbours to fetch either the police or a locksmith, or both. Mr Pitt ran out at once, both police and locksmith were brought upon the scene, the door was forcibly opened, and amidst indescribable excitement Constable Turner, followed by Miss Dyke, who was faint and trembling with apprehension, effected an entrance into the flat.

“Everything in it was tidy and neat to a degree, all the fires were laid, the beds made, the floors were clean and washed, the brasses polished, only a slight, very slight layer of dust lay over everything, dust that could not have accumulated for more than a few days. The flat consisted of four rooms and a bathroom; in not one of them was there the faintest trace of old Mr Dyke.

“In order fully to comprehend the consternation which all the neighbours felt at this discovery,” continued the man in the corner, “you must understand that old Mr Dyke was a helpless cripple; he had been a mining engineer in his young days, and a terrible blasting accident deprived him, at the age of forty, of both legs. They had been amputated just above the knee, and the unfortunate man – then a widower with one little girl – had spent the remainder of his life on crutches. He had a small – a very small – pension, which, as soon as his daughter Amelia was grown up, had enabled him to live in comparative comfort in the small flat in Lisson Grove Crescent.

“His misfortune, however, had left him terribly sensitive; he never could bear the looks of compassion thrown upon him, whenever he ventured out on his crutches, and even the kindliest sympathy was positive torture to him. Gradually, therefore, as he got on in life, he took to staying more and more at home, and after a while gave up going out altogether. By the time he was sixty-five years old and Miss Amelia a fine young woman of seven-and-twenty, old Dyke had not been outside the door of his flat for at least five years.

“And yet, when Constable Turner aided by the locksmith entered the flat on that memorable 24th November, there was not a trace anywhere of the old man.

“Miss Amelia was in the last stages of despair, and at first she seemed far too upset and hysterical to give the police any coherent and definite information. At last, however, from amid the chaos of tears and of ejaculations, Constable Turner gathered the following facts:

“Miss Amelia had some great friends in Edinburgh whom she had long wished to visit, her father’s crippled condition making this extremely difficult. A fortnight ago, however, in response to a very urgent invitation, she at last decided to accept it, but in order to leave her father altogether comfortable, she advertised in the local paper for a respectable woman who would come to the flat every day and see to all the work, cook his dinner, make the bed, and so on.

“She had several applications in reply to this advertisement, and ultimately selected a very worthy looking elderly person, who, for seven shillings a week, undertook to come daily from seven in the morning until about six in the afternoon, to see to all Mr Dyke’s comforts.

“Miss Amelia was very favourably impressed with this person’s respectable and motherly appearance, and she left for Edinburgh by the 5.15 a.m. train on the morning of Thursday, 19th November, feeling confident that her father would be well looked after. She certainly had not heard from the old man while she was away, but she had not expected to hear unless, indeed, something had been wrong.

“Miss Amelia was quite sure that something dreadful had happened to her father, as he could not possibly have walked downstairs and out of the house alone; certainly his crutches were nowhere to be found, but this only helped to deepen the mystery of the old man’s disappearance.

“The constable, having got thus far with his notes, thought it best to refer the whole matter at this stage to higher authority. He got from Miss Amelia the name and address of the charwoman, and then went back to the station.

“There, the very first news that greeted him was that the medical officer of the district had just sent round to the various police stations his report on the human remains found in Wembley Park the previous Saturday. They had proved to be the dismembered body of an old man between sixty and seventy years of age, the immediate cause of whose death had undoubtedly been a violent blow on the back of the head with a heavy instrument, which had shattered the cranium. Expert examination further revealed the fact that deceased had had in early life both legs removed by a surgical operation just above the knee.

“That was the end of the prologue in the Lisson Grove tragedy,” continued the man in the corner, after a slight and dramatic pause, “as far as the public was concerned. When the curtain was subsequently raised upon the first act, the situation had been considerably changed.

“The remains had been positively identified as those of old Mr Dyke, and a charge of wilful murder had been brought against Alfred Wyatt, of no occupation, residing in Warlock Road, Lisson Grove, and against Amelia Dyke for complicity in the crime. They are the two people whom I am going to see this afternoon brought before the ‘beak’ at the Marylebone Police Court.”

2

“Two very important bits of evidence, I must tell you, had come to light, on the first day of the inquest and had decided the police to make this double arrest.

“In the first place, according to one or two of the neighbours, who happened to know something of the Dyke household, Miss Amelia had kept company for some time with a young man named Alfred Wyatt; he was an electrical engineer, resided in the neighbourhood, and was some years younger than Miss Dyke.