Space Viking by H. Beam Piper

So Andray Dunnan was haunting him again. Tiny bits of information came in -- Dunnan's ship had been on Hoth, on Nergal, selling loot. Now he sold for gold or platinum, and bought little, usually arms and ammunition. Apparently his base, wherever it was, was fully self-sufficient. It was certain, too, that Dunnan knew he was being hunted. One Space Viking who had talked with him quoted him as saying: "I don't want any trouble with Trask, and if he's smart he won't look for any with me. " This made him all the more positive that somewhere Dunnan was building strength for an attack on Tanith. He made it a rule that there should always be at least two ships in orbit off Tanith in addition to the _Lamia_, which was on permanent patrol, and he installed more missile-launching stations both on the moon and on the planet.

There were three ships bearing the Ward swords and atom-symbol, and a fourth building on Gram. Count Lionel of Newhaven was building one of his own, and three big freighters shuttled across the three thousand light-years between Tanith and Gram. Sesar Karvall, who had never recovered from his wounds, had died; Lady Lavina had turned the barony and the business over to her brother, Burt Sandrasan, and gone to live on Excalibur. The shipyard at Rivington was finished, and now they had built the landing-legs of Harkaman's _Corisande II_, and were putting up the skeleton.