[Remains of wood bridge, Rio Segre, Aragon Front, near Fraga]

[Republican soldiers and a mule transporting munitions, Rio Segre, Aragón Front, near Fraga, Spain]

[Two women and three children carrying their personal belongings in the street, Barcelona]

[Four militiamen aiming their rifles on a hill, Santa Eulalia, Aragon Front, Spain]

[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]

[Miner crouching and examining mercury, Almaden, Spain]

[Miner crouching and examining the mercury, Almaden, Spain]

[Small mercury tanks ready for shipment, Almaden, Spain]

[Miners doing the Republican salute, Almaden, Spain]

[Miners descending into the pit, Almaden, Spain]

[Miners descending into the pit, Almaden, Spain]

[Miners doing the Republican salute, Almadén, Spain]

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

[Miner on a heap of cinnabar, Almaden, Spain]

[Neon sign above Steinbrook Pharmacy, New York]

[Entrance to the mercury mine, Almaden, Spain]

[Miners pushing a wagon of cinnabar, Almaden, Spain]