Wikipedia 10K Redux by Reagle from Starling archive. Bugs abound!!!
When /RichardHalley disappeared he had written only four concertos. In /SectioN112 /DagnyTaggart, and enthusiastic fan of /RichardHalley's music, hears an unfamiliar theme being whistled by a /BrakemaN on the /TaggartComet. She asks him what it is and he says Halley's Fifth Concerto. When Dagny says Halley only wrote four concertos, the /BrakemaN says he made a mistake and denies knowing what the song was. Later, Dagny calls /MrAyers to find out if Halley wrote a fifth concerto. He says he did not. Halley's Fifth Concerto is mentioned in: /SectioN112 /SectioN114 /SectioN152