"I am afraid I could not make you understand it all, unless you could go to the silk manufactory, and even then it would be hard for you. But I can tell you about the cocoons, and that is the strangest thing about it. The silkworm was first brought to Europe from India in 530, when monks brought it to the Emperor Justinian. The silkworm is a kind of a caterpillar which feeds on the leaves of the white mulberry-tree, and lays his eggs in a kind of gummy substance on the leaves in the end of June to be hatched out in the following April. The caterpillar is small at first, about a quarter of an inch long, but grows to be three inches in length. By means of a substance in their mouths the silkworms spin out silky strands which form cocoons, each fibre being about eight hundred yards long. When ready for weaving, the cocoons are placed in an oven at a gentle heat which kills the chrysalis so that the silk fibres can be removed and wound." "How do they get the silk wound? Doesn't it break?" asked Fernando. "It is rather hard to do," his uncle answered, "but they learn to be very careful, and the cocoon is soaked in warm water which loosens the little filaments. When the cocoons are reeled the first step has been taken, and the reeled silk is called raw silk, from which all silk products are made." [Illustration: "THEY WENT TO THE ALCAZAR GARDENS."] "I wish we could see it all, but perhaps we can sometime when we are here again," said Fernando. "Oh, it has stopped raining!" "Yes, indeed, and the Guadalquiver has overflowed its banks," said Pablo, coming in at that moment. "There has not been such a freshet for years. Come along with me, Nando, and we will go boating in the streets. I climbed to the top of the Giralda, and the whole country looks like a great sea." "Oh, may I go with Pablo and see?" cried Fernando, and his mother, with many injunctions to Pablo to take care of him, said "Yes."