Swan Tower

When I wrote "Weeds Among Stone," I had fun with exactly that sort of thing. I had dwarf farmers of magical magicalness producing enough food to sustain all those city dwarves that don't farm plus all the refugees from a famine. For yields, I assumed modern mechanistic yields and multiplied out the numbers. A small population of 50,000 farmers could sustain a city of a million, along with all the pollution and water contamination. Dump in vast sewage sewage of class and race prejudice, and you've got a fine mess.