ML's favourite child was the Duc d'Anjou, who died very young. The poor child was sickly and some of the women attending him, being very superstitious, gave him the earth from the Saint Medard cemetery to eat, mixed into his food. It came from the grave of a saintly person. After the child's death, when the doctors opened up the body, they found a lot of earth in his intestines. It was a mystery as the child did not go into the garden and there was none in his bedroom. They could not understand how he ingested such a large quantity of earth. Only for Marie Leczinska to find out with horror that her child has been given the earth from the Saint Medard cemetary!