E gads! The picture of the little Franksolich mercenary selling visuals of Contagious Diseases Illustrated boggles the mind 
For some reason, the guy with leprosy sticks out most clearly in the mind.
I wasn't aware leprosy gives one leonine features.
That is, until I went to the socialist paradises of the workers and peasants with free medical care for all, and suddenly and abruptly I recalled all those photographs of people with contagious diseases.
These were medical textbooks, not general books, I had seen, meaning they were explicitly and clearly shown, and it all came back to me when I was over there.