At different times during my researches I have heard delicate raps, which sounded as if produced by a pin's point; a cascade of piercing sounds, like those of a machine in full motion; detonations in the air; light and acute metallic taps; cracking noises, like those produced by a floor-polishing machine; sounds which resembled scratching; warbling, like that of birds. Each of these noises, which I have tested through different mediums, had its special peculiarity. With Mr. Home they were more varied; but, in strength and regularity, I have heard no sounds which could approach those which came through Miss Kate Fox. During several months I had the pleasure, on almost innumerable occasions, of testing the varying phenomena which took place in the presence of this lady, and it was the sounds which I specially studied. It is usually necessary with other mediums, in a regular seance, to sit awhile before anything is heard; but with Miss Fox it seems to be merely necessary to place her hand on something, no matter what, for the sounds to manifest themselves like a triplicated echo, and sometimes loud enough to be noticeable across several intervening rooms. I have heard some of these noises produced in a living tree, in a large pane of glass, on a stretched wire, on a tambourine, on the roof of a cab, and in the box of a theatre. Moreover, immediate contact is not always necessary. I have heard these noises proceeding from the flooring and walls, when the medium's hands and feet were tied, when he was standing on a chair, when he was in a swing suspended from the ceiling, when he was imprisoned in an iron cage, and when he lay in a swoon on a sofa. I have heard them proceed from musical glasses. I have felt them on my own shoulders, and under my own hands. I have heard them on a piece of paper, fastened between the fingers by a string through the corner of the sheet. With a full knowledge of the numerous theories which have been brought forward to explain these sounds, especially in America, I have tested them in every way I could devise, until it was no longer possible to escape the conviction that these sounds were real, and produced neither by fraud nor by mechanical means.