"The piece uses recorded tape loops of different cats purring to create an auditory metaphor for walking the labyrinth. Each step is replaced by ten seconds of a single cat purring, until the listener reaches the symbolic center when all the cats finally purr together."
Constance Lewallen describing one of Terry Fox’s sound pieces, The Labyrinth Scored for the Purrs of 11 Different Cats, in a 2003 catalog essay for Fox’s solo show at Kunsthalle Fridericianum in Kassel, Germany.
http://www.last.fm/music/Terry+Fox/+wiki