As shown in our plan, the bailey of the castle no longer existed. It was replaced by a wide ditch, A, of little depth; its bottom was on a level with the two boulevards, B and C. A third boulevard surrounded the base of the donjon externally, in the place of the ancient _chemise_. This boulevard commanded the stone bridge rebuilt in the fourteenth century on the Roman piers. Before the north front was raised an isolated boulevard of earth, D, of slight elevation, but commanding the road of the plateau. At the angles of the north front two large towers, E, F, adapted to receive cannon, flanked the angles and were in a position to sweep the boulevard, D. Set back on the eastern side, a similar tower, G, commanded the valley of the rivulet. Two boulevards, H and I, forming projections beneath the defences of the fourteenth century, commanded the course of the river, and could cross their fire with the boulevard B, and the tower E. A boulevard was also raised on the eastern salient at K. The faubourg had preserved its two parish churches, and a convent of Jacobins had been built at L, on lands bought by Saint Louis while the fief of La Roche-Pont was still directly dependent on the crown of France. The abbey of Saint-Julien, O, had diminished its enclosure, and yielded a part of its estates. Houses arose in its ancient pleasance, whose perimeter had been somewhat altered. These habitations were within its liberties and belonged to the abbey, which granted them on lease. At M, a parish church under the invocation of Our Lady had been built towards the end of the thirteenth century, when the lord of La Roche-Pont, wanting money, sold some lands--formerly belonging to the castle--for building. At N was the market-place. Three gates gave admission to the _cité_: one on the north, called Saint-Julien's gate; one on the east, Mill-gate; and the third on the south-east, called Castle-gate. We must enter into some details respecting the new defences raised under Charles the Bold. Figure 49 presents a bird's-eye view of the northern boulevard, D, with the _cité_ front in the background, its gate of the fourteenth century, and the two great corner towers. [Illustration: FIG. 49.] Fig. 50 A gives the plan of one of these towers at the level of the lower battery, and B its section through _a_, _b_. These towers were forty yards in diameter on the outside, and consisted of a low battery, whose floor was six feet beneath the upper level of the plateau. The descent to this low battery was by a slope ending in an octagonal hall whose vaults rested on four great cylindrical pillars. Three chambers with embrasures for three large cannons opened into this hall. By the galleries, C, there was a communication between two of these chambers and two other smaller ones pierced with embrasures for culverins. From the descent D, two passages, E, gave access to two chambers, F, likewise arranged with embrasures to receive two large guns.