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
