Sophronia made her way around to the far side of the ship, out of view from the watchers below. But not before she saw Sidheag sit next to Captain Niall, along with Dimity and Pillover.
Giffard’s aether-current floater, the Puffy Nimbus Eighteen, swooped into sight, ululating in their direction. Sophronia had once manned an airdinghy, and she knew enough to admire Giffard’s skill. Once the other airship was level with Mademoiselle Geraldine’s, the school extended a long gangplank to it, and Professor Braithwope ran across with a tightrope walker’s skill. The gangplank was drawn back and the two ships began to rise ponderously, keeping pace with each other. Sophronia had intended to check up on the sooties, but she was hypnotized by the action above her, so she stayed hanging where she was. Professor Braithwope and Mr. Giffard exchanged pleasantries, and then Mr. Giffard went back to work steering his small vessel. The two ships rose together, so high the people below became little specks. Then so did the trees of the park. Finally, London herself was nothing but a blob of twinkling lights. They were above the clouds at last, and then higher than Sophronia had ever floated. The air was glacial and the winds howled by; the propeller pushed hard against the breezes through which the school normally drifted peaceably.
Sophronia wondered if there would be a defining shift when they hit the aetherosphere. She knew that it must be close, that invisible onion skin, the thing that protected them all from the void beyond. She couldn’t believe they intended to take Mademoiselle Geraldine’s up that high. Giffard’s aether-current floater was built for the changeable humors of the upper sphere, but Geraldine’s was not.
She turned her attention to Professor Braithwope. The vampire stood stiff and straight, leaning back against the railing of the Puffy Nimbus’s one squeak deck and looking up. Sophronia could hardly fathom that he intended to enter aetherosphere. Very little was known about it, except that it was breathable but dense, not like normal air, and dangerous. Only humans had ever been inside it, and only very few of them. But no other vampire could float up even a short distance; Professor Braithwope was the exception, by virtue of his inhabiting their school. So the school had to go up with him as far as it could, keeping his tether as short as possible.
They intended all along to send the vampire, suited in his protective gear, into the aetherosphere on Giffard’s ship. He will be the first supernatural creature to enter aether. They want to know—vampires, werewolves, government, Picklemen. They all want to know: what happens to a supernatural creature in the aetherosphere? They built him a suit as a nod to safety, but they really have no idea what will occur up there.
Professor Braithwope was undergoing a very dangerous test indeed. For queen and country, the potentate had said. For science, Sophronia thought.
Mademoiselle Geraldine’s stopped rising and held steady, the propeller fighting to keep the school in place. They had gone up as high up as possible. Directly above us, thought Sophronia, must be the aetherosphere. It boggled her mind. She looked but couldn’t see anything apart from very bright stars. The aetherosphere was invisible from below, and opaque from within, or so she’d heard.
Giffard gave some kind of signal and the Puffy Nimbus bobbed up, leaving Mademoiselle Geraldine’s behind.
At first everything seemed fine. Then Professor Braithwope began to gyrate around in his mechanical suit, waving his hands about his face as if fending off a swam of attacking wasps. The mating dance of a mechanical was Sophronia’s hysterical thought.
Giffard seemed to be occupied doing battle with his navigation helm. Sophronia thought she heard Professor Braithwope scream. Then she saw him jerk wildly backward, come up against the railing, and flip right over it. At the time and for years after, she was never certain if he fell accidentally or jumped in order to get relief from invisible tormentors.