Kassander Volso commands Slavewatch, the Gorathi fortress that holds the three passes between the northern villages of Tamadrez and the Slaver's Coast. He is fifty-three, heavyset, and slower to anger than his reputation suggests. His father held the post before him, and his father's father before that, so that a command meant to rotate every few years has hardened into something the empire never agreed to and now cannot undo. The institution he runs is described under Slavewatch. This is the man.
Volso was born on Pesalolo and has never lived anywhere else. He speaks fluent Drasnian, which almost no Gorathi officer bothers to learn, and he married a Tamadrezan woman from one of the northern fishing towns. She died bearing their son. The son wears the same garrison colors his father does and will, if nothing breaks the pattern, inherit the post in turn. Volso has spent thirty years learning exactly how much everyone around him is willing to pay, and the answer has made him rich.
What he understands, and what his distant superiors in Azantir do not, is that Slavewatch's power is the power of being necessary to all sides. The empire needs it to catch enough escapees to prove the passes are watched. The slaver captains need it to tell them which coastal ports are taking cargo. The northern villages need it to look the other way. And the escapees, though they never know it, need whichever of those payments happened to come in heaviest the week they ran. Volso sits at the junction and takes a cut of every direction the traffic flows.
I do not sell slaves. I sell weather. A patrol is somewhere or it is somewhere else, the way rain is. A village that pays me has good weather. That is all I am. I am the man who decides where it rains. — Kassander Volso, to an Azantir auditor who did not return
The instrument is the navigation fee. A northern village remits a sum, collected and forwarded through the Tamadrezan port-reeves, and in exchange Volso's patrols are reliably elsewhere when fugitives move through that village's stretch of pass. It is one channel with two ends. The Tamadrezan end gathers the coin; the Slavewatch end delivers the absence. Volso did not invent the arrangement, but he is the one who turned it from occasional graft into a standing tariff with a schedule, and he keeps a broker, Helmo, whose only job is to know who has paid and who is overdue.
He is not cruel, which is the part people find hardest to square. The slave trade disgusts him, not on any moral ground he could name but the way a slaughterhouse disgusts a man who eats meat. He has been below the decks of the ships. He sells passage to the slavers anyway, because they pay, and he sells passage to the people fleeing them, because they also pay, and he has never once felt the two facts press against each other. He intends to die rich and old in the only place he has ever lived.
Emperor Veramus knows. The emperor watches Slavewatch the way a man watches a debt he cannot afford to call in, suspecting the rot and unable to prove its shape, because the only people qualified to replace Volso are either corruptible the moment they arrive or dead of mountain fever inside a year. Volso has made certain of the second part. He keeps records, held by Helmo and copied elsewhere, of every imperial official who ever took his coin to ignore what the fortress does, and the understanding in Azantir is that if Kassander Volso dies unhappy, a great many careful men in the capital die with him. So the emperor watches, and does not move, and Volso grows older at his post.
The one thing he has not accounted for is one of his own lieutenants. Renzo serves under him, runs his patrols, signs his manifests, and quietly empties the passes of the people Volso has sold. Volso has not yet noticed. When he does, it will not be a moral question for him. It will be an accounting error.