English herbalists believed that the trailing evergreen ground cover could be gathered only on the 1st, 9th, 11th, or 13th day of the Moon by a person cleansed of all impurities.
Those who carried the plant believed that they were protected from the devil and safe from the bites of rabid dogs and venomous serpents.
The Scots named this powerful plant joy-of-the-ground. They believed that marital bliss would be ensured if the leaves were ground to powder and taken at meals in a freshly picked houseleek that contained worms. (We have a hunch that a lot of Scottish couples endured unhappy marriages rather than brave the cure.)