Alien: Early Ridleygram of the rear of the space jockey (1978) for Alien by Ridley Scott

Leading from

Ridleygrams

a) Early Ridleygram of the Space Jockey seat seen from behind

b) See: References "Hitler Masturbating", (1973) by Salvador Dali? 

c) See: Evolution via  Dali's "Dream Flight of a Bee Around a Pomegranate" and Plop! comic #13?

d) See: Evolution via Dali's Autumnal Cannibalism and illustration publicising the Grand Prix movie in Radio Times from 1974 ?

e) Other Ridleygram of Space Jockey seen from behind (380a in Giger's Alien book, although drawn by Ridley, I expect for HR Giger)

Was it drawn before or after the official storyboard above?

I don't really know, but perhaps it was afterwards.