"I am glad to hear that," exclaimed Mr. Croyden. "Then you will remember what a wonderful structure it was. In its interior have been found many highly glazed tiles beautifully designed and decorated in colors and in gold. Within this palace, too, was found the famous Alhambra Vase, three feet four inches in height, and made in 1320. It is a piece of work quite different from anything the Greeks made, but in its way is quite as perfect. It is of earthenware, with a white ground, and is enameled in two shades of blue with a further decoration of gold or copper lustre. I speak particularly of this use of glaze because it is very important. Until people knew how to glaze their wares many of the comforts and conveniences of living were impossible. Men carried water or wine in leather gourds, or in clay vessels coated on the inside with a layer of gum to prevent the contents from leaking or evaporating." "I should think the gum would have made the liquid taste," said Theo. "It did. That was precisely the trouble. Beside that think of the waste. Suppose you lost half the water you needed for your journey by having it evaporate. Think in addition what it meant if a large part of your food dried up in the cooking." Theo looked grave. "I should not like that at all." "Nor did your ancestors," laughed Mr. Croyden. "Well, it was to these Mohammedan Arabs, or Saracens, as they are termed, that Europe fundamentally owed its knowledge of the use of glaze, and its consequent beginning in the art of pottery-making. The Saracens did not, however, remain in Spain. There was an uprising of the Christians and they were either driven out or slaughtered, almost every relic of their civilization being destroyed. A stray temple or palace alone remains as a monument to them and this was more the result of chance, probably, than of intention. For two centuries following came an interval known as the Dark Ages, when none of the arts flourished. But before the Moors had fled from Spain the Italians who lived near at hand and whose territory the invaders often plundered had tired of their pillaging and in return had made an expedition into the Saracens' country bringing back with them to Italy some of the Majolica ware of the Arabs. When the nations began to awaken out of their two hundred years of warfare and strife, and Genoa, Venice, and Leghorn became great commercial centres, then the Renaissance came and the Italians, who were ever an ingenious people, began among other things to attempt to copy the glaze on this Majolica ware. As a result in the fifteenth century Luca della Robbia, who was both a sculptor and a potter, contrived to perfect his wonderful glazed terra cotta." "Not the Delia Robbia who did the Singing Boys we have on the wall at school!"