What could it be? How had she first known it? In what way was her father connected with it?
In the course of our walks she had told me nothing about herself which was not perfectly simple and unsuggestive.
Her childhood had been passed in England. After that, she had lived with her father and mother at Paris, where the doctor had many friends--for all of whom she remembered feeling more or less dislike, without being able to tell why. They had then come to England, and had lived in lodgings in London. For a time they had been miserably poor. But, after her mother's death--a sudden death from heart disease--there had come a change in their affairs, which she was quite unable to explain. They had removed to their present abode, to give the doctor full accommodation for the carrying on of his scientific pursuits. He often had occasion to go to London; but never took her with him. The only woman at home now, beside herself, was an elderly person, who acted as cook and housekeeper, and who had been in their service for many years. It was very lonely sometimes not having a companion of her own age and sex; but she had got tolerably used to bear it, and to amuse herself with her books, and music, and flowers.
Thus far she chatted about herself quite freely; but when I tried, even in the vaguest manner, to lead her into discussing the causes of her strangely secluded life, she looked so distressed, and became so suddenly silent, that I naturally refrained from saying another word on that topic. One conclusion, however, I felt tolera bly sure that I had drawn correctly from what she said: her father's conduct toward her, though not absolutely blamable or grossly neglectful on any point, had still never been of a nature to make her ardently fond of him. He performed the ordinary parental duties rigidly and respectably enough; but he had apparently not cared to win all the filial love which his daughter would have bestowed on a more affectionate man.
When, after reflecting on what Alicia had told me, I began to call to mind what I had been able to observe for myself, I found ample materials to excite my curiosity in relation to the doctor, if not my distrust.
I have already described how I heard the clang of the heavy door, on the occasion of my first visit to the red-brick house. The next day, when the doctor again took leave of me in the hall, I hit on a plan for seeing the door as well as hearing it. I dawdled on my way out, till I heard the clang again; then pretended to remember some important message which I had forgotten to give to the doctor, and with a look of innocent hurry ran upstairs to overtake him. The disguised workman ran after me with a shout of "Stop!" I was conveniently deaf to him--reached the first floor landing--and arrived at a door which shut off the whole staircase higher up; an iron door, as solid as if it belonged to a banker's strong-room, and guarded millions of money. I returned to the hall, inattentive to the servant's not over-civil remonstrances, and, saying that I would wait till I saw the doctor again, left the house.
The next day two pale-looking men, in artisan costume, came up to the gate at the same time as I did, each carrying a long wooden box under his arm, strongly bound with iron. I tried to make them talk while we were waiting for admission, but neither of them would go beyond "Yes," or "No"; and both had, to my eyes, some unmistakably sinister lines in their faces. The next day the houskeeping cook came to the door--a buxom old woman with a look and a ready smile, and something in her manner which suggested that she had not begun life quite so respectably as she was now ending it. She seemed to be decidedly satisfied with my personal appearance; talked to me on indifferent matters with great glibness; but suddenly became silent and diplomatic the moment I looked toward the stair and asked innocently if she had to go up and down them often in the course of the day. As for the doctor himself he was unapproachable on the subject of the mysterious upper regions. If I introduced chemistry in general into the conversation he begged me not to spoil his happy holiday hours with his daughter and me, by leading him back to his work-a-day thoughts. If I referred to his own experiments in particular he always made a joke about being afraid of my chemical knowledge, and of my wishing to anticipate him in his discoveries. In brief, after a week's run of the lower regions, the upper part of the red-brick house and the actual nature of its owner's occupations still remained impenetrable mysteries to me, pry, ponder, and question as I might.
Thinking of this on the river-bank, in connection with the distressing scene which I had just had with Alicia, I found that the mysterious obstacle at which she had hinted, the mysterious life led by her father, and the mysterious top of the house that had hitherto defied my curiosity, all three connected themselves in my mind as links of the same chain. The obstacle to my marrying Alicia was the thing that most troubled me. If I only found out what it was, and if I made light of it (which I was resolved beforehand to do, let it be what it might), I should most probably end by overcoming her scruples, and taking her away from the ominous red-brick house in the character of my wife. But how was I to make the all-important discovery?
Cudgeling my brains for an answer to this question, I fell at last into reasoning upon it, by a process of natural logic, something after this fashion: The mysterious top of the house is connected with the doctor, and the doctor is connected with the obstacle which has made wretchedness between Alicia and me. If I can only get to the top of the house, I may get also to the root of the obstacle. It is a dangerous and an uncertain experiment; but, come what may of it, I will try and find out, if human ingenuity can compass the means, what Doctor Dulcifer's occupation really is, on the other side of that iron door.
Having come to this resolution (and deriving, let me add, parenthetically, great consolation from it), the next subject of consideration was the best method of getting safely into the top regions of the house.
Picking the lock of the iron door was out of the question, from the exposed nature of the situation which that mysterious iron barrier occupied. My only possible way to the second floor lay by the back of the house. I had looked up at it two or three times, while walking in the garden after dinner with Alicia. What had I brought away in my memory as the result of that casual inspection of my host's back premises? Several fragments of useful information.
In the first place, one of the most magnificent vines I had ever seen grew against the back wall of the house, trained carefully on a strong trellis-work. In the second place, the middle first-floor back window looked out on a little stone balcony, built on the top of the porch over the garden door. In the third place, the back windows of the second floor had been open, on each occasion when I had seen them--most probably to air the house, which could not be ventilated from the front during the hot summer weather, in consequence of the shut-up condition of all the windows thereabouts.