For the Mumps - Legends, Charms, and Superstitions of Ireland

Wrap the child in a blanket, take it to the pigsty, rub the child's head to the back of a pig, and the mumps will leave it and pass from the child to the animal.

Another.

Take nine black stones gathered before sunrise, and bring the patient with a rope round his neck to a holy well—not speaking all the while. Then cast in three stones in the name of God, three in the name of Christ, and three in the name of Mary. Repeat this process for three mornings and the disease will be cured.