He sat in the chapel for hours picking his way through fugues. A dozen notes, hardly music. But then those few notes spoke to each other, subject and answer, by repetition, by diminution, by augmentation, even looping backwards on themselves in a course like the retrograde motion of Mars. He listened as if he had as many ears as fingertips, and, like a blind man, could feel textures that were barely there. At the end of two or three pages of music he would hear all the voices twining together in a construction of such dizzying power that the walls of the chapel could barely contain it.