When the song was finished, the visitor called Joseph to his side. "Can you trill for me, my boy?" "No, sir; I have never been taught; but I can try." Taking the child on his knee, the stranger showed him how to trill. Then Joseph tried and did well. His new friend was so delighted with his little pupil that he filled his hands and pockets with bright red cherries. Now you must know that the stranger was none other than the chapel master of a great church in Vienna. He said to Joseph's cousin, "That boy sang so sweetly and learned to trill so easily that I want him in my choir." It was soon settled that the boy should go to Vienna. In a short time he became a member of the choir in St. Stephen's Church in that city. The boy was eager to learn all that he could about music. If he heard the great organ when he was at his games with the other boys, he would leave them at once. He would tiptoe into the dimly lighted church. Seating himself in one corner, he would not stir until the last echo of music had died away. During all the years that Joseph Haydn was a choir boy in Vienna, he had very little money to spend. He saved every penny that came into his hands. When he was thirteen, he bought two books that he might know more of music. He spent every spare moment in study. He learned much about music, but was never taught to compose. This did not prevent him from trying. Joseph knew that he must study harder than he had ever done. When Joseph Haydn was about sixteen years old, his voice changed. Because it became harsh and deep, the chapel master no longer wanted him in the choir. One cold winter night he left St. Stephen's Church and wandered through the streets of Vienna, hungry and without a home. What would have happened to the poor boy had he not met a friend, we do not know. The kind friend was a barber, who said, "Our rooms are small and our food is simple, but you are welcome to both." The lonely boy gladly accepted the invitation of the barber and went with him to his humble home. The room in the attic was indeed small and poorly furnished. The wind and the rain came through the cracks, and the snow sometimes sifted down upon his bed. Yet he was not altogether unhappy there. He soon found work and was able to pay the barber for his room. Sometimes he played the violin at a ball. He liked that because he was always given a good warm supper afterward. Again he earned a trifle by giving music lessons. Haydn and some other young men often wandered through the streets playing. They were fond of going out on moonlight nights to serenade some musician. Haydn often composed the music which the band played. One night they went to serenade the leader of the opera. They stood under his window with their violins. Soon the moonlit garden was filled with the sweetest music. At a pause in the music a window was flung open and out came a nightcapped head. Loudly spoke a voice, saying, "Who is playing there?" "Joseph Haydn."