Joseph picked up his father’s trumpet from the table. “When I first play all the four Heynals you must listen and see if you hear a single note played wrong.” [Illustration: _Entrance to St. Katherine’s Church in the Kazimierz. In the Background Are the Towers of the Church on the Skalka._] “I will listen.” “If I play a wrong note I will give you my cap. If I play two, then I will give you Wolf.” He smiled then, as a boyish thought came to him. “If I ever play the Heynal through to the end, without stopping at the broken note, then you may run to Jan Kanty and tell him to summon the watch, for then something will have happened to me.” “How do you mean?” She was as ever serious, though he was smiling. “You know the story of this hymn, the Heynal?” “Yes,” she answered. “How, when the Tartars burned the city, the trumpeter stayed on duty and played the hours as he had sworn?” “Yes. . . . A brave story.” “Well”—Joseph liked to see the blue eyes widen—“one night the Tartars will attack the city, or perhaps the Knights of the Cross. I shall see them coming from afar, in the midst of fire and smoke, and I shall hear war cries and their horses hoofs. And I shall be all alone in the tower that night, for neither my father nor any person will be here. And when I realize that it is an enemy, I must have a signal, since I myself may not leave the tower—a signal to some one in the town who will give the alarm. So I will play the Heynal, but I will not stop on the broken note. That note does not end the measure, you know. I will play on, two or three notes further.” “Excellent,” she cried, and her cheeks were red with the excitement of it. “If I hear you play the Heynal without stopping at the broken note, I will run straight to Jan Kanty.” “Now, come look at the city,” he broke off conversation on the subject. He was a little ashamed, for he had not expected Elzbietka to take his remarks quite so seriously. She had not taken the trumpet signal as the jest he intended, but had rejoiced at it as do most young people when they have a secret with some important person. And to her Joseph was a person of very great importance, not only because of his prowess with the trumpet and his progress in the collegium, but because, indeed, he possessed somehow more than ordinary seriousness for a boy of his age.