I know there was a picture of an Inquisitor Lord on a throne somewhere in a Dark Heresy book, but I can't seem to find it anywhere. I've checked nearly everything page by page. It's basically a drawing of this miniature:

Someone please help me out, I'm getting bonkers not finding it!

That's Lord Inquisitor Fyodor Karamazov on the Throne of Judgement:

http://wh40k.lexicanum.com/wiki/Fyodor_Karamazov

Radical's Handbook
page 76

Yes, that's the one! Thank the Emperor both of you!