Regardless of Londo's doubts, regardless of the questions that gnawed at him, he was still a member of the Dark Guild. That was the undeniable truth. Whatever he might feel about Harvey's orders, whatever unease he carried, the reality remained the same, if he spoke out, if he faltered even for a second, then he would be the next one to die.
The thought chilled him. Perhaps this was how the others had felt once. Perhaps, long ago, some of them had questioned things too. And perhaps, like him now, they had quickly learned that hesitation was a luxury they could not afford. If you allowed yourself to think too much, you would be swept away by the tide, consumed by the momentum of the Guild.