Blackberries are extremely useful in cases of dysentery*. To eat the berries is very healthy; tea made of the roots and leaves is beneficial; and a syrup made of the berries is still better. Blackberries have sometimes effected a cure when physicians despaired.
American Frugal Housewife, 1833
*Dysentery (formerly known as flux or the bloody flux) is an infection of the digestive system that results in severe diarrhea containing mucus and blood in the feces. Dysentery is typically the result of unsanitary water.