I thought Quartet was an ambitious follow-up on the promise of Telephone, but it was not one that colonized my imagination to the same degree as Telephone. It was too chaotic. Too much noise, not enough signal. To have the pleasure of surprise you need to have some predictability - not a strict system that must be slavishly adhered to, but without any formula what-so-ever there can't be an anticipation of how things might go. The arbitrary chaos of Revolution 9 never alows one to settle down, to get into a rhythm with the work. Telephone had that because we all know how phone calls are structured, the kinds of things people say on phones.
The investigation of a specific site is a matter of extracting concepts out of existing sense-data through direct perceptions. Perception is prior to conception, when it comes to site selection or definition. One does not impose, but rather expose the site - be it interior or exterior. Interiors may be treated as exteriors or vice versa. The unknown areas of sites can best be explored by artists.