The natural action of the wind-pressure takes the paper along the string, and so up to the kite itself, no matter how high or how far it may have gone.
In the early days of this amusement Edgar Caswall spent hours.

Hundreds of such messengers flew along the string, until soon he bethought him of writing messages on these papers so that he could make known his ideas to the kite.

It may be that his brain gave way under the opportunities given by his illusion of the entity of the toy and its power of separate thought.

From sending messages he came to making direct speech to the kite--without, however, ceasing to send the runners.

Doubtless, the height of the tower, seated as it was on the hill-top, the rushing of the ceaseless wind, the hypnotic effect of the lofty altitude of the speck in the sky at which he gazed, and the rushing of the paper messengers up the string till sight of them was lost in distance, all helped to further affect his brain, undoubtedly giving way under the strain of beliefs and circumstances which were at once stimulating to the imagination, occupative of his mind, and absorbing.
The next step of intellectual decline was to bring to bear on the main idea of the conscious identity of the kite all sorts of subjects which had imaginative force or tendency of their own.