The Rue du Tourniquet-Saint-Jean, formerly one of the darkest and most tortuous of the streets about the Hotel de Ville, zigzagged round the little gardens of the Paris Prefecture, and ended at the Rue Martroi, exactly at the angle of an old wall now pulled down. Here stood the turnstile to which the street owed its name; it was not removed till 1823, when the Municipality built a ballroom on the garden plot adjoining the Hotel de Ville, for the fete given in honor of the Duc d'Angouleme on his return from Spain.
    The widest part of the Rue du Tourniquet was the end opening into the Rue de la Tixeranderie, and even there it was less than six feet across. Hence in rainy weather the gutter water