In chronic cases the eventual effects are anaemia, melanosis, enlargement of the spleen and liver, and general cachexia.
He is stated to have died of "melanosis of the lungs," a disease in which the whole substance of the lungs turns completely black.
melanosis mel·a·no·sis (měl'ə-nō'sĭs)
Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism. Also called melanism.