Katy had taken to calling her friend "Polly dear" of late,--a trick picked up half unconsciously from Lieutenant Ned. Mrs. Ashe liked it; it was sisterly and intimate, she said, and made her feel nearer Katy's age. "Does the tower really lean?" questioned Amy,--"far over, I mean, so that we can see it?" "We shall know to-morrow," replied Katy. "If it doesn't, I shall lose all my confidence in human nature." Katy's confidence in human nature was not doomed to be impaired. There stood the famous tower, when they reached the Place del Duomo in Pisa, next morning, looking all aslant, exactly as it does in the pictures and the alabaster models, and seeming as if in another moment it must topple over, from its own weight, upon their heads. Mrs. Ashe declared that it was so unnatural that it made her flesh creep; and when she was coaxed up the winding staircase to the top, she turned so giddy that they were all thankful to get her safely down to firm ground again. She turned her back upon the tower, as they crossed the grassy space to the majestic old Cathedral, saying that if she thought about it any more, she should become a disbeliever in the attraction of gravitation, which she had always been told all respectable people _must_ believe in. The guide showed them the lamp swinging by a long slender chain, before which Galileo is said to have sat and pondered while he worked out his theory of the pendulum. This lamp seemed a sort of own cousin to the attraction of gravitation, and they gazed upon it with respect. Then they went to the Baptistery to see Niccolo Pisano's magnificent pulpit of creamy marble, a mass of sculpture supported on the backs of lions, and the equally lovely font, and to admire the extraordinary sound which their guide evoked from a mysterious echo, with which he seemed to be on intimate terms, for he made it say whatever he would and almost "answer back." It was in coming out of the Baptistery that they met with an adventure which Amy could never quite forget. Pisa is the mendicant city of Italy, and her streets are infested with a band of religious beggars who call themselves the Brethren of the Order of Mercy. They wear loose black gowns, sandals laced over their bare feet, and black cambric masks with holes, through which their eyes glare awfully; and they carry tin cups for the reception of offerings, which they thrust into the faces of all strangers visiting the city, whom they look upon as their lawful prey.