In Upper Brittany, also, the Yule log is thought to be a safeguard against thunder and lightning. It is sprinkled with holy water on Christmas morning and allowed to burn till evening. If a piece of it is thrown into the well, it will ensure a supply of good water.[649] [The Yule log in the Ardennes.] "In almost all the families of the Ardennes," we are told, "at the present day they never fail to put the Yule log on the fireplace, but formerly it was the object of a superstitious worship which is now obsolete. The charred remains of it, placed under the pillow or under the house, preserved the house from storms, and before it was burned the Virgin used to come and sit on it, invisible, swaddling the infant Jesus. At Nouzon, twenty years ago, the traditional log was brought into the kitchen on Christmas Eve, and the grandmother, with a sprig of box in her hand, sprinkled the log with holy water as soon as the clock struck the first stroke of midnight. As she did so she chanted, '_When Christmas comes, Every one should rejoice, For it is a New Covenant_.' "Following the grandmother and joining in the song, the children and the rest of the family marched thrice round the log, which was as fine a log as could be got."[650] We can now, perhaps, understand why in Perigord people who sat on the Yule log suffered from boils,[651] and why in Lorraine young folks used to be warned that if they sat on it they would have the scab.[652] The reason probably was that the Virgin and child were supposed to be seated, invisible, upon the log and to resent the indignity of contact with mortal children. [The Yule log in the Vosges; the Yule log in Franche-Comté and Burgundy.]