[Republican soldiers reading against a wall, Madrid]

[Civilians take shelter in the subway during the bombing, Madrid]

[Small mercury tanks, Almadén, Spain]

[Miners descending into the pit, Almaden, Spain]

[Mercury miners saluting, Almadén, Spain]

[Worker emptying a bag of mercury, Almaden, Spain]

"This sign, advertising a short cut to beauty, blinked two stories above the fire."

[Worker emptying a bag of mercury, Almaden, Spain]