According to my grandmother who is from Kentucky, what must be done is cut a potatoe in half. Rub the potatoe on the wart, bind the potatoe back together with string, then bury it without the person with the wart knowing where it is buried. If the potatoe is dug back up before it rots the wart will return to that person. Or if the person that had the wart finds out where it was buried it will not go away, or will return. Course that is just her version of the wart thing. She said anyone could do it didn't have to be a 7 of the 7th. But there were things 7 of 7th could do that others couldn't. As mentioned before curing Thrush, or an earache.