I told Edwards nothing of Sir Digby's curious request, of his strange confidences, or of the mysterious letter to "E. P. K.", which now reposed in a locked drawer in my writing-table.

My friend, be he impostor or not, had always treated me strictly honourably and well. Therefore, I did not intend to betray him, although he might be a fugitive hunted by the police.

Yet was he a fugitive? Did not his words to me and his marvellous disguise prior to the tragedy imply an intention to disappear?

The enigma was indeed beyond solution.

At seven o'clock my visitor, finding necessity to revisit Harrington Gardens, I eagerly accompanied him.

There is a briskness and brightness in Piccadilly at seven o'clock on a clear, cold, winter's night unequalled in any thoroughfare in the world. On the pavements and in the motor-buses are thousands of London's workers hurrying to their homes in western suburbs, mostly the female employees of the hundreds of shops and work-rooms which supply the world's fashions—for, after all, London has now ousted Paris as the centre of the feminine mode—the shops are still gaily lit, the club windows have not yet drawn their blinds, and as motors and taxis flash past eastward, one catches glimpses of pretty women in gay evening gowns, accompanied by their male escorts on pleasure bent: the restaurant, the theatre, and the supper, until the unwelcome cry—that cry which resounds at half-past twelve from end to end of Greater London, "Time, please, ladies and gentlemen. Time!"—the pharisaical decree that further harmless merriment is forbidden. How the foreigner laughs at our childish obedience to the decree of the killjoys. And well he may, especially when we know full well that while the good people of the middle class are forced to return to the dulness of their particular suburb, the people of the class above them can sneak in by back doors of unsuspected places, and indulge in drinking, gambling, and dancing till daylight. Truly the middle-class Londoner is a meek, obedient person. One day, however, he may revolt.

Piccadilly was particularly bright and gay that night, as, passing the end of St. James's Street, we sped forward in the taxi towards Brompton Road and past the Natural History Museum to Gloucester Road.

On our arrival the door of the flat was opened by a constable without a helmet. Recognising the famous inspector, he saluted.

The body of the unknown girl had been removed to the mortuary for a post-mortem examination, but nothing else had been moved, and two officers of the C.I.D. were busy making examination for finger-prints.

I allowed them to take mine for comparison, but some they found upon the mahogany table and upon the back of a chair were undoubtedly those of the victim herself.

The small glass-topped specimen-table still lay where it had been overturned, and the fragments of the two green-glass flower-vases were strewn upon the carpet with the drooping red anemones themselves.

Regarding the overturned table the two detectives held that it had separated the assassin from his victim; that the girl had been chased around it several times before her assailant had thrown it down, suddenly sprung upon her, and delivered the fatal blow, full in her chest.

"We've thoroughly examined it for finger-prints, sir," the elder of the two officers explained to my companion. "Both on the glass top and on the mahogany edge there are a number of prints of the victim herself, as well as a number made by another hand."

"A man's?" I asked.

"No; curiously enough, it seems to be a woman's," was the reply.

"A woman's!"

I thought of that sweet perfume, and of the person who had lurked in the shadow of the stairs!

"That's interesting," remarked Edwards. "They may be those of the woman who wore green combs in her hair, or else of the porter's wife."

"The owner's man-servant is away abroad on business for his master, we've found out," answered the man addressed. "So of late the porter's wife, who lives in the basement of the next house, has been in the habit of coming in every day and tidying up the room. We took her prints this morning, and have found quite a lot about the place. No," added the man emphatically, "the finger-prints on that little table yonder are not those of the porter's wife, but of another woman who's been here recently. We only find them upon the door-handle and on the edge of the writing-table, against which the woman must have leaned. We'll have them photographed to-morrow."

The men then showed us the marks in question—distinct impressions of small finger-tips, which they had rendered vivid and undeniable by the application of a finely-powdered chalk of a pale green colour.

Apparently the two experts had devoted the whole day to the search for finger-print clues, and they had established the fact that two women had been there—the victim and another.

Who was she?

The investigation of the papers in my friend's writing-table had not yet been made. Inspector Edwards had telephoned earlier in the day, stating that he would himself go through them.

Therefore, exercising every care not to obliterate the three finger-marks upon the edge of the table, the officers proceeded to break open drawer after drawer and methodically examine the contents while I looked on.

The work was exciting. At any moment we might discover something which would throw light upon the tragedy, the grim evidence of which remained in that dark, still damp stain upon the carpet—the life-blood of the unknown victim.

Already the face of the dead girl had been photographed, and would, before morning, be circulated everywhere in an endeavour to secure identification.

I had learnt from Edwards that before noon that morning, upon the notice-board outside Bow Street Police Station, there had been posted one of those pale, buff-coloured bills headed in great, bold capitals: "Body found," in which the description had been filled in by a clerkish hand, and at the bottom a statement that the corpse was lying at the Kensington Mortuary awaiting identification.

That she was a lady seemed established by her dress, her well-kept hands, innocent of manual labour, by the costly rings and bracelet she was wearing, and the fact that, in the pocket of her coat was found her purse containing eleven pounds in gold and some silver.

Sir Digby's papers promised to be extremely interesting, as we cleared the books off a side-table and sat down to carefully investigate them.

The writing-table was a pedestal one, with a centre drawer and four drawers on either side. The first drawer burst open was the top one on the left, and from it Edwards drew two bundles of letters, each secured by faded pink tape.

These bundles he handed to me, saying—

"See what you think of these, Mr. Royle!"

One after another I opened them. They were all in the same sprawly handwriting of a woman—a woman who simply signed herself "Mittie."

They were love-letters written in the long ago, many commencing "My darling," or "Dearest," and some with "Dear old Dig."

Though it seemed mean of me to peer into the closed chapter of my friend's history, I quickly found myself absorbed in them. They were the passionate outpourings of a brave but overburdened heart. Most of them were dated from hotels in the South of England and in Ireland, and were apparently written at the end of the eighties. But as no envelopes had been preserved they gave no clue to where the addressee had been at the time.

Nearly all were on foreign notepaper, so we agreed that he must have been abroad.

As I read, it became apparent that the writer and the addressee had been deeply in love with one another, but the lady's parents had forbidden their marriage; and as, alas! in so many like cases, she had been induced to make an odious but wealthier marriage. The man's name was Francis.

At the old place! Where was it, I wondered? At what spot had the secret meeting been effected between the man who had returned from abroad and the woman who loved him so well, though she had been forced to become the wife of another.

That meeting had taken place more than twenty years ago. What had been its result was shown in the next letter I opened.

Written from the Queen's Hotel at Hastings on the fourth of October, the unfortunate "Mittie," who seemed to spend her life travelling on the South Coast, penned the following in a thin, uncertain hand:—

I sat staring at that half-faded letter, taking no heed of what Edwards was saying.

The fountain! They had met at the fountain, and had been seen!

Could that spot be the same as mentioned in the mysterious letter left behind by the fugitive Cane after the sudden death of the Englishman away in far-off Peru?

Did someone, after all the lapse of years, go there on every twenty-third of the month at noon wearing a yellow flower, to wait for a person who, alas! never came?

The thought filled me with romance, even though we were at that moment investigating a very remarkable tragedy. Yet surely in no city in this world is there so much romance, so much pathos, such whole-hearted love and affection, or such deep and deadly hatred as in our great palpitating metropolis, where secret assassinations are of daily occurrence, and where the most unpardonable sin is that of being found out.

"What's that you've got hold of?" Edwards asked me, as he crossed to the table and bent over me.

I started.

Then, recovering myself—for I had no desire that he should know—replied, quite coolly:

"Oh, only a few old letters—written long ago, in the eighties."

"Ah! Ancient history, eh?"

"Yes," I replied, packing them together and retying them with the soiled, pink tape. "But have you discovered anything?"

"Well," he replied with a self-conscious smile, "I've found a letter here which rather alters my theory," and I saw that he held a piece of grey notepaper in his hand. "Here is a note addressed to him as long ago as 1900 in the name of Sir Digby Kemsley! Perhaps, after all, the man who died so mysteriously in Peru was an impostor, and the owner of this place was the real Sir Digby!"

"Exactly my own theory," I declared.

"But that fountain!" he remarked. "The fountain mentioned in the letter left behind by the man Cane. We must take immediate steps to identify it, and it must be watched on the twenty-third for the coming of the woman who wears a yellow flower. When we find her, we shall be able to discover something very interesting, Mr. Royle. Don't you agree?"