“The atmosphere of a planet with six billion souls upon it, yes. Six billion souls who had been infected with a most horrible parasite by a megalomaniac would-be conqueror of the Realm, Josich the Emperor Hadun. A Ghoma, you might recall. A creature of the water, really. He’d found a way, the only known way, to conquer whole worlds composed of various races alien to him, and to even control environments he could not himself exist in without an environment suit.

Tiny little quasiorganic machines, like viruses, transmitted like viruses as well, who could remake and tailor themselves for any bioorganism, any place, anywhere, and turn whole populations into slaves. There was no way to cure them; the things were more communicable than air and water. Isolate them, and they killed the hosts, horribly. Let them go, and a whole planet would be devoted to infecting everyone and everything else. It was the greatest horror our common histories ever produced.”

She shivered, remembering now why she’d not liked that kind of history. “And this Kincaid—he was a part of this?”

“A liner was intercepted and boarded. Everyone on it was infected. It was only because of security systems that it only reached Magan Thune before being discovered and dealt with. There are such horrible distances in space for even messages and warnings to cover, and you cannot station naval ships with great firepower at every one. We—all our races—breed a bit too much for that. Kincaid was commander of a small frigate, an escort naval vessel used in frontier areas. He’d come to the sector to meet his mate and children, and have some leave on some resort world. He wasn’t supposed to come to Magan Thune at all, but went to check when the liner was late making its next port of call.”

She was suddenly appalled. “He was the one who ignited the atmosphere?”