If, to pursue the subject historically, we were to look for remains of the great wall with innumerable towers which Philip Augustus built before his departure for the Crusades, in order not to leave his dear city of Paris without defence, we should find it difficult to discover even traces; though the most imposing of the towers were destroyed not more than twenty or thirty years ago. They were brought to light by preceding demolitions, themselves in turn to be laid in ruins. At the foot of one of these towers a treasure, dating from Gallo-Roman times, was dug up. It was valued, according to the weight of the gold, at 30,000 francs, though its artistic and historical worth was a hundred times greater. Most of the medals found their way to England. In the Cour de Rouen, close to the Passage du Commerce, is, or was until lately, to be seen a well-preserved fragment of a Philip Augustus tower, standing, half-smothered with ivy, on a piece of wall, broad enough to serve as terrace to the adjoining house, where a girls’ school had been established. “It is a joyful sight,” says M. Edouard Fournier, “to see children of the present day leaping and bounding on this remnant of antiquity.” Further on, in the Rue Clovis--which the reader may remember as figuring in Eugène Sue’s “Wandering Jew”--is another relic of this same wall. In the Rue Dauphine, at the back of the house numbered 34, is a tower almost in its original form; and close by, in the Rue Guénégaud, the body of another, which stood on the edge of the wall that from this point went on in a straight line to the celebrated Tour de Nesle. The ruined tower of the Rue Guénégaud served some years ago as background to a blacksmith’s forge, whose flames cast a lurid light on this obscure reminder of a past age. [Illustration: SITE OF THE HOUSE OF ABAILARD AND HÉLOISE, RUE DES CHANTRES.] Passing to the other side of the water (where our subject inevitably leads us, though it is on the left bank that Paris antiquities are chiefly to be sought), we find several houses ancient themselves, or at least closely connected with ancient associations. In the former Rue des Jardins Saint-Paul--now Rue Charlemagne--where Rabelais died, and where Molière passed the first years of his dramatic apprenticeship, may be seen, in the courtyard of the neighbouring barracks, remains of one of the two towers which Charles X. gave in 1485 to the nuns of the Ave Maria convent, whose cloister the barracks have now replaced. At No. 20 of the Rue Rambuteau some twenty metres of the old wall, here in the form of a terrace, are to be found; and finally, in the very heart of Paris, in the Rue Jean Jacques Rousseau, where the General Post Office is established, is preserved at the back of No. 12 a tower which has still two-thirds of its original height. It stands twenty-four feet above the soil. In its entirety it was, like all the other towers, thirty-nine feet high.