“This,” said the stranger, pointing first to the script containing the writing, “is a copy of the oath that you have already sworn. This other is the music of the Heynal, the hymn which you must play from the church tower every hour of the night. The trumpeter whom you relieve to-night will give you the key to the tower room, and what information you may need. It is a noble piece of work, this sounding of the Heynal, and I am much pleased that Father Jan has been able to find so good a Pole as you to carry out the night duties. With this he kissed Pan Andrew upon the right cheek and departed.” Joseph stared in frank amazement. The Heynal! The church tower. And his father! “I will tell you everything,” said the father as they sat down to the noonday meal. “This oath which I have sworn is the customary oath taken by the watchman-trumpeter of the tower of the Church of Our Lady Mary. You may read it at your leisure. The music is the hymn with the broken note of which I have promised to tell you the story soon. It is played each hour from the windows in the octagon room at the top of the higher tower.” “And you are to be the trumpeter?” asked Joseph. “I am, thanks to the good Jan Kanty,” the father answered. “The trumpeter and the watchman as well, for it is from this tower that fires throughout the city are sighted and the alarm given with the big bell. For the present it must be for our own safety that we are known as the Kovalski family, a name which Father Jan has given us. As plain Andrew Kovalski I shall be a mere city dweller of Krakow. I shall be trumpeter, succeeding the man—God rest his soul!—who died but a week ago, since which time there has been a substitute who can play but badly.” “But the man said each hour of the night,” exclaimed the boy. “Will you be there all night?” “Yes,” answered Pan Andrew. “It is for my own safety to be abroad in the city only after nightfall. None will recognize me then—and as for you, my son, the good father has arranged that you shall attend the Collegium Minus here, to complete your studies which I and your tutors have already begun with you. But there must be caution employed even by you, for there are people who seek nothing better than to find us and despoil us of our treasure. You may take your exercises with the other boys very soon, however, and go abroad with discretion, for in the clothes which I shall buy you there will be no danger, I think, that you may be recognized. A close mouth is necessary nevertheless. Tell no one of our adventures and be content for the time with the plain name Joseph Kovalski.” Thus at the direction of the good Jan Kanty, Pan Andrew became Pan Kovalski—Joseph was to be sent to school—and the watchtower of the Church of Our Lady Mary was to see a new trumpeter.