A. Merritt

alien adj.	1919 A. Merritt Moon Pool xxviii. 355 Subtly, undefinably it was of our world and of one not ours… It had eyes—eyes that were now only shadows darkening within its luminosity like veils falling, and falling, opening windows into the unknowable; deepening into softly glowing blue pools, blue as the Moon Pool itself; then flashing out, and this only when the—face—bore its most human resemblance, into twin stars large almost as the crown of little moons; and with that same baffling suggestion of peep-holes into a world untrodden, alien, perilous to man!