"Glandulae renibus incumbents, though significantly larger than what I usually see. We each have two of the very same organ within us, perched atop our kidneys like a jaunty hat, and it's actually the centre of something of a controversy within anatomist circles, over whether it should be properly labelled ad-renal or supra-renal. Humoralists call them capsulae atrabiliarae, believing it to be an instrument for the creation or storage of black bile. The rest of us, being burdened with the obligation to actually investigate and test instead of being able to make it up as we go along, were a little more in the dark, and in truth few had given them too much attention. One more weird wobbly bit in a body full of 'em. But if our downstairs neighbours are going to the trouble of collecting and preserving them in a warzone, it stands to reason that there must be some significance to them. So I rounded up some physiology students and pointed them towards the slaughterhouses, and before long they were able to reliably extract the fluid within. Unfortunately for you and me, but fortunately for the advancement of knowledge, one of them blabbed to the Physicians Guild, and now those buggers are running around giving it to everyone for everything. I can't get them to stop - might be there's not a power in the world that could get them to stop selling the latest nostrums - but I can bully them into telling me what they've found, and I have."