The second soul, that of physiological life, is located in the liver, and is of primary importance in doctoring and in conjuring. This soul is a substance, is not anthropomorphic in any, has no individuality, and is quantitative, there is more or less of it. Its secretions are yellow bile, black bile, gastric juice, etc. Destruction of the liver substance produces lassitude, the “yellows” (jaundice or hepatitis, or cirrhosis) or the “black” (deep depression or gall bladder attacks or acute pancreatitis). Exhaustion of the liver substance (absence of the soul) produces physiological death. This soul may be attacked by the conjuror, producing false “yellows” or “black” as “simulation diseases,” reproducing the symptoms of witch-attack, or it may be actually consumed by witches to produce the standard form of liver-gall-pancreas diseases. The witch lengthens its life by extra supplies of liver-soul.
— Frans M. Olbrechts, editor, “The Swimmer Manuscript” (1932).