Ah, that Toch. Got quite the way with words, don't he?
As for some of the other points raised here: Toch's dealings with "that lout Corsine" first came to light in the middle of "This Mortal Coil," our 28th storyline, and while I don't think we've ever had an explicit list of their unsavory doings, we got plenty of hints before Alban rather messily removed Corsine from the Daily Grind world at the end of the abovementioned 28th storyline. And Gravelle, Lord Toch's loyal retainer, I don't think we've seen her since the middle of "The Way of All Flesh," our 30th storyline. So many characters!
Forty-Seven - Maintenance