I work at a cologne and perfume factory, so I have to ask: How exactly does one have the "fragrance of a Gibbous moon"?
Perhaps synesthesia? "A neurological condition in which the brain interprets one set of sensory input in terms of a different one; i.e., 'smelling' shapes, 'tasting' sounds, 'seeing' scents, etc."
It would certainly explain the... florid... prose of the rest of the exerpt. However, given that many cases of the phenomenon are almost as unique as handwriting, we still don't know what a "Gibbous moon" would smell like. Though a highly unpleasant image involving a man named Gibb is fighting its way into my conscious thoughts, despite my fervent resistance...