I have no idea what particular chapter it says, but I've heard and read other indications pointing that in order for Lucifer to have been cast down there to begin with, it needed to already exist.
And what happened to your intro? I thought you posted one in the Meadow.
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"For many are called, but few are chosen" - Matthew 22:14 ver. New American Standard.
"Though my soul is born from darkness, it shall rise in perfect light, I have loved the stars too fondly, to be fearful of the night". Unknown
"On those nights that I gazed upon the full moon in longing it was always you that my heart was calling and it is now I realize you are the one." - me