The Cradle Tower, which is the third tower on the southern side of the outer Ballium wall, the others being the Develin and the Well Towers, was opened out and restored in the year 1878. Before its restoration, the southern wall was closed up, the only apertures being two loopholes. There was nothing to indicate that it ever had any connection with the moat, and the only access to the interior was on the north side, within the Ballium wall. It was used as a gunpowder store, and was only one storey in height, no trace remaining of the second storey which originally existed. The first step taken was to remove the whole of the masonry which had been built up against the Tower; this disclosed the old front as well as an arch on the south side. The return walls extended ten feet, and were built with their southern face in the moat, having two half arches turned against the moat wall, and when the masonry blocking up the arch in the south wall and these two half arches was removed, it at once became evident that formerly the water in the moat had flowed through the half arches and across the centre arch. By clearing away this masonry the wall of the moat itself was disclosed, and was found to be of an earlier date than the architecture of the Tower itself. On the ground floor there is a chamber with a finely groined roof of the late thirteenth or early fourteenth century. The following is the actual restoration done to the Cradle Tower. The wall built up in the moat under the centre arch and under the two half-turned arches has been cleared away, and the outer walls have all been restored to their original condition. An additional storey and turret have been erected on the same plan as the old building. The corbels in the groined roof of the ground floor chamber, which were broken off, have been replaced by new ones copied from a single corbel that remained. A wooden grating, after the pattern of an old doorway in the Byward Tower, has been fitted to the central arch, whilst the space between that arch and the moat has been boarded over. [Illustration: _The White Tower, showing the Exterior of St. John’s Chapel and remains of the Roman Wall_]