Random question but I am interested in why and how the herb Common Centaury was used in exorcisms in the middle ages in Britain and was the plant used for the same reason in other parts of Europe and Asia? Was it to do with the patient vomiting yellow or black bale? The herb has useful liver protective properties and is said to be a bitter taste. The herb is used for kidney and gallbladder complaints. It was also used for snakebites, poisoning and a cure for poison arrows. Many thanks