The 'burchiello' may be considered a small floating house. There is a large saloon with a smaller cabin at each end, and rooms for servants fore and aft. It is a long square with a roof, and cut on each side by glazed windows with shutters. The voyage takes eight hours. M. Grimani, M. Baffo, and my mother accompanied me. I slept with her in the saloon, and the two friends passed the night in one of the cabins. My mother rose at day break, opened one of the windows facing the bed, and the rays of the rising sun, falling on my eyes, caused me to open them. The bed was too low for me to see the land; I could see through the window only the tops of the trees along the river. The boat was sailing with such an even movement that I could not realize the fact of our moving, so that the trees, which, one after the other, were rapidly disappearing from my sight, caused me an extreme surprise. "Ah, dear mother!" I exclaimed, "what is this? the trees are walking!" At that very moment the two noblemen came in, and reading astonishment on my countenance, they asked me what my thoughts were so busy about. "How is it," I answered, "that the trees are walking." They all laughed, but my mother, heaving a great sigh, told me, in a tone of deep pity, "The boat is moving, the trees are not. Now dress yourself." I understood at once the reason of the phenomenon. "Then it may be," said I, "that the sun does not move, and that we, on the contrary, are revolving from west to east." At these words my good mother fairly screamed. M. Grimani pitied my foolishness, and I remained dismayed, grieved, and ready to cry. M. Baffo brought me life again. He rushed to me, embraced me tenderly, and said, "Thou are right, my child. The sun does not move; take courage, give heed to your reasoning powers and let others laugh." My mother, greatly surprised, asked him whether he had taken leave of his senses to give me such lessons; but the philosopher, not even condescending to answer her, went on sketching a theory in harmony with my young and simple intelligence. This was the first real pleasure I enjoyed in my life. Had it not been for M. Baffo, this circumstance might have been enough to degrade my understanding; the weakness of credulity would have become part of my mind. The ignorance of the two others would certainly have blunted in me the edge of a faculty which, perhaps, has not carried me very far in my after life, but to which alone I feel that I am indebted for every particle of happiness I enjoy when I look into myself.