De Selby was always devious and hid his real purpose, that being the dissemination of his pseudo science musings, by concealing them as asides and footnotes within the story telling genius writings of Flann O'Brien.
It has only recently come to light that the great De Selby generated an unpublished
book which explained (inter alia): the nature of dark matter; a resolution of the Daggart Conjecture and a method of speaking in Hedge. (this latter skill enables Hedges to grow into infinitely elaborate topiary structures on receipt of a series of daily whispered commands)
The book was never written down and only exists in the form of detailed dance notation language.
For this final creative act, De Selby generated an obscure Flamenco Dance that delivers the entire book in Morse Code. Subtle waving arm movements were also choreographed into semaphore to add a layer of detail to the overall spectacle of communication.
"At Swim Two Dancers" - if you can understand it, you havent understood it. (HB idea 1111)