titon du tillet wrote about marais in his book "le parnasse françois". he describes a piece from marais' fourth book called "the labyrinth", which goes through lots of keys. the notes which are often dissonant, sometimes fast, sometimes slow, describe a man caught in a labyrinth. eventually the man comes out of it happily and the music finishes with a gracious and natural chaconne. another piece called "la gamme" [the scale], very gradually goes up the steps of the octave and then down again.