There once was a majestic cathedral in Northern Europe that was known for its magnificent organ. Unlike the pipe organs and electronic organs of our day, the organs in the old churches of Europe depended upon air pumped by hand to produce sound. When they had services or wanted to play the organ, an assistant to man the pumps was needed in addition to an organist to press the keys.

There is a story told of one time when a guest organist was scheduled to play a recital featuring the works of Mozart and Mendelssohn. As was the custom, when the organist appeared at the organ bench, he turned and bowed to the crowd and announced the music he was going to play. "For my first selection today," he said, "I will play a piece by Mozart." With that he turned to the organ and after a moment, with gr…