He had been engaged to be married at the time of his illness, and, when he learned what was likely to be its results, had offered to release the young lady from all obligation to him. But she would not be released, and they were married. This had taken place some five years previous to Mr. Hasbrouck's death, three of which had been spent by them in Lafayette Place.

So much for the beautiful woman next door.

There being absolutely no clue to the assailant of Mr. Hasbrouck, I naturally looked forward to the inquest for some evidence upon which to work. But there seemed to be no underlying facts to this tragedy. The most careful study into the habits and conduct of the deceased brought nothing to light save his general beneficence and rectitude, nor was there in his history or in that of his wife any secret or hidden obligation calculated to provoke any such act of revenge as murder. Mrs. Hasbrouck's surmise that the intruder was simply a burglar, and that she had rather imagined than heard the words that pointed to the shooting as a deed of vengeance, soon gained general credence. But, though the police worked long and arduously in this new direction, their efforts were without fruit, and the case bade fair to remain an unsolvable mystery.

But the deeper the mystery the more persistently does my mind cling to it, and some five months after the matter had been delegated to oblivion, I found myself starting suddenly from sleep, with these words ringing in my ears:

"Who uttered the scream that gave the first alarm of Mr. Hasbrouck's violent death?"

I was in such a state of excitement that the perspiration stood out on my forehead. Mrs. Hasbrouck's story of the occurrence returned to me, and I remembered as distinctly as if she were then speaking, that she had expressly stated that she did not scream when confronted by the sight of her husband's dead body. But some one had screamed, and that very loudly. Who was it, then? One of the maids, startled by the sudden summons from below, or some one else—some involuntary witness of the crime, whose testimony had been suppressed at the inquest, by fear or influence?

The possibility of having come upon a clue even at this late day, so fired my ambition, that I took the first opportunity of revisiting Lafayette Place. Choosing such persons as I thought most open to my questions, I learned that there were many who could testify to having heard a woman's shrill scream on that memorable night just prior to the alarm given by old Cyrus, but no one who could tell from whose lips it had come. One fact, however, was immediately settled. It had not been the result of the servant-women's fears. Both of the girls were positive that they had uttered no sound, nor had they themselves heard any, till Cyrus rushed to the window with his wild cries. As the scream, by whomever given, was uttered before they descended the stairs, I was convinced by these assurances that it had issued from one of the front windows, and not from the rear of the house, where their own rooms lay. Could it be that it had sprung from the adjoining dwelling, and that— My thoughts went no further, but I made up my mind to visit the Doctor's house at once.

It took some courage to do this, for the Doctor's wife had attended the inquest, and her beauty, seen in broad daylight, had worn such an aspect of mingled sweetness and dignity, that I hesitated to encounter it under any circumstances likely to disturb its pure serenity. But a clue, once grasped, can not be lightly set aside by a true detective, and it would have taken more than a woman's frown to stop me at this point. So I rang Dr. Zabriskie's bell.

I am seventy years old now and am no longer daunted by the charms of a beautiful woman, but I confess that when I found myself in the fine reception parlor on the first floor, I experienced no little trepidation at the prospect of the interview which awaited me.

But as soon as the fine commanding form of the Doctor's wife crossed the threshold, I recovered my senses and surveyed her with as direct a gaze as my position allowed. For her aspect bespoke a degree of emotion that astonished me; and even before I spoke I perceived her to be trembling, though she was a woman of no little natural dignity and self-possession.