Monique -
Thanks for the link to Vieilles Chansons et Rondes

The nastier illustrations must be in the Chansons de France book, although I was as a child bothered by the soldiers jumping (or falling) head first off the tower in "La Tour, Prend Guard" and the dead boy,dog and bug with their feet sticking up in the air in "Le Petit Chasseur." I have no memory of those two songs themselves but the pictures were as fresh as yesterday.