Joyce-Armstrong takes his monoplane to a height of 40,000 feet and is nearly hit by three meteors. It is then that he learns that his speculations are right: entire ecosystems (air-jungles) exist high in the atmosphere, and are inhabited by huge, gelatinous, semi-solid creatures. After going through a flock of animals superficially resembling jellyfish and snakes, Joyce-Armstrong is attacked by a more solid-looking but amorphous creature with a beak and tentacles, from which he narrowly escapes.