[Illustration: FIG. 50.--MASONRY TOWER FOR ARTILLERY.] The barrel vaults of these rooms had openings to allow the smoke to escape. Small powder magazines, G, opened near each of the chambers, and five large lunettes pierced in the vaults of the central hall gave air and light to the interior. At H, a well was connected with a cistern constructed under the central hall, as indicated in section B. This cistern was supplied by rain-water falling on the platform and discharged by four pipes passing down through the inner walls. Two winding staircases connected the lower battery with the platform and the curtains of the fourteenth century, I I, and allowed of a descent through two posterns, K, into the braie, L, defended by an epaulement, a palisade, and narrow ditch. Flanks, _l_, raked the salient of this braie. The curtain, whose rampart walk rose six feet above the level of the platform, closed the gorge of the tower, as shown in section B at N. Two watch-towers, P, were built in the thickness of the parapet, pierced with nineteen embrasures for small pieces. This parapet was not too high for arbalisters to shoot over its slope. A wide incline, R, facilitated the getting up of guns and the ascent of men to the platform. Fig. 51 presents a bird's-eye view of boulevard _I_,[36] with the ramparts of the fourteenth century. These boulevards were earthworks, and their interior surface was four yards below the level of the plateau. The boulevards, B and C, raised at the western angles of the castle, had their platforms on a level with the bottom of the ditch, as mentioned above. Having thus described the general plan and the details, we proceed to narrate the events of which the town of La Roche-Pont was the theatre in 1477 and 1478. [Illustration: FIG. 51.] With a view to securing the aid of the Prince of Orange, after the death of Duke Charles, Louis XI. had been most liberal to him in promises, one of which was that he would place in his hands all the strong towns of Burgundy that belonged to the estate of the Prince of Orange, his grandfather, and which Duke Charles had forestalled. But when the Seigneur de Craon had taken possession of these places he would not give them up, notwithstanding the demands made upon him by the Prince, and the apparent orders of King Louis XI. The marriage between the daughter of Charles the Bold, sole heiress of his domains, and Maximilian, Duke of Austria, took place in the meantime. The latter proceeded to recover possession of the duchy of Burgundy, and had a conference with the Prince of Orange, exasperated at the non-fulfilment of the promises made him; while the province was soon to a large extent roused against the French, whom the Seigneur de Craon, eager for gain, and by no means faithful in accomplishing his engagements, rendered detestable.