Another romantically placed house is Bolsover Castle, which is mentioned in ancient records as a sister stronghold of the Peak Castle. Of the early building nothing is now left; but the sites of the keep and of the enclosing wall are curiously preserved, and occupied by highly interesting buildings of the early seventeenth century. The keep is replaced by a square house, planned with considerable ingenuity so as to obtain within a limited and strictly defined space the customary arrangements of a Jacobean residence. It rises abruptly from the brow of a steep hill, and looks far and wide over the valley now studded with colliery chimneys. Within the thickness of the wall which marks the _enceinte_ of ancient times are contrived quaint chambers, carefully vaulted and furnished in some cases with curious chimney-pieces. Indeed, this early seventeenth century work, particularly in the successor of the keep, is quite remarkable in respect of its vaulting and its fireplaces. Vaulting was very seldom used in Jacobean work, yet here we have examples of that method of construction which need not fear comparison with those of earlier days, when masons were much more accustomed to its use. The chimney-pieces at Bolsover are a noteworthy series, exhibiting a great variety of treatment, yet preserving a family likeness, and adorned, most of them, with unusual delicacy. This part of the castle was executed for Sir Charles Cavendish, a son of the renowned Bess of Hardwick, about the year 1613. The actual owner of Bolsover was Gilbert, seventh Earl of Shrewsbury; but he had granted a lease of 1,000 years to Sir Charles, who was at once his step-brother and his brother-in-law. [Illustration: Bolsover Castle: “La Gallerie.”] Outside the ancient precincts of this part of the castle stand the ruins of a later building, lying parallel with the brow of the hill, and leaving a broad terrace between the building and the sloping ground. It is designed on a much larger and coarser scale than its neighbour, and was built by Sir William Cavendish, son of Sir Charles, about the year 1629. It was this Sir William, subsequently created, after a distinguished career, Duke of Newcastle, who wrote a celebrated treatise on horsemanship, some plates of which he adorned with a view of his Bolsover building. This he calls “La Gallerie,” and it was probably intended as a supplement to the somewhat restricted accommodation of the earlier house. The Duke was also responsible for another charming portion of this interesting group of buildings at Bolsover, in the shape of the Riding School, a structure which has a considerable Dutch flavour about it.