course catalogue for 1978-79 , institute of chaos studies and imaginal yoga ( no address ) ; xerox of mimeographed flyer , 7pp an in-house document from the institute where the first breakthrough was attained ( probably in the late winter or early spring of 1979 ) therefore , although it makes no overt mention of travel or the egg , the catalogue is of prime importance for an understanding of the intellectual and historical background of the event .