Note 12 — Chapter II · THE ART OF DANCING
Reading edition
It is even possible that, in earlier than human times, dancing and architecture may have been the result of the same impulse. The nest of birds is the chief early form of building, and Edmund Selous has suggested (Zoölogist, December, 1901) that the nest may first have arisen as an accidental result of the ecstatic sexual dance of birds.