Tommy was more and more astonished at the introduction of all these new ideas; but what he was particularly inquisitive about was, to know the reason of this extraordinary change in the appearance of objects, only by looking through a hollow tube with a bit of glass fixed into it. "All this," replied Mr Barlow, "I will, if you desire it, one day explain to you; but it is rather too long and difficult to undertake it at the present moment. When you are a little farther advanced in some of the things which you are now studying, you will comprehend me better. However, before we retire to-night, I will show you something more, which will perhaps equally surprise you." They then returned to the house, and Mr Barlow, who had prepared everything for his intended exhibition, led Tommy into a room, where he observed nothing but a lantern upon the floor, and a white sheet hung up against the wall. Tommy laughed, and said he did not see anything very curious in all that. "Well," said Mr Barlow, "perhaps I may surprise you yet, before I have done; let us at least light up the lantern, that you may see a little clearer." Mr Barlow then lighted a lamp which was within the lantern, and extinguished all the other candles; and Tommy was instantly struck with astonishment to see a gigantic figure of a man, leading along a large bear, appear upon the wall, and glide slowly along the sheet. As he was admiring this wonderful sight, a large monkey, dressed up in the habit of a man, appeared and followed the bear; after him came an old woman trundling a barrow of fruit, and then two boys (who, however, were as big as men) that seemed to be fighting as they passed.