The richly ornamented gold hoop has on its shoulders a lion and a unicorn of chiseled steel. On the bezel is a steel plate engraved with the Royal arms, those of France and England in the first and fourth quarters; in the second, the arms of Scotland; and in the third, the Irish harp. On the sides of the gold base of the bezel is the inscription: “_Dieu et mon droit_,” inserted in steel letters] One of the most interesting engraved diamonds is the signet of Charles I of England, when Prince of Wales.[271] This is a large shield-shaped diamond engraved in intaglio with the Prince of Wales’ feathers between the letters C.P. and issuing from a coronet; on a ribbon beneath appears the motto ~ICH DIEN~. The stone is set in a ring of enamelled gold. The engraving is finely executed and deeply cut. This signet has often been regarded as that of Charles II, but all doubt as to the original owner is set at rest by the existence of an autograph letter of Charles I, in the possession of M. Labouchère of Paris, bearing its impress. The Royal Collection at Windsor Castle also contains the signet used by Charles I, as King. It has a richly ornamented hoop, to which are attached, at the shoulders, chiseled steel figures of a lion and a unicorn. The gold bezel has a steel facing constituting the seal. This is engraved with the royal arms; in the first and fourth quarters, the arms of England and of France; in the second quarter, those of Scotland; in the fourth quarter, the Irish harp. On the gold base of the bezel is the motto: Dieu et mon Droit, inserted in letters of steel. This constitutes an exceptionally fine example of composite metal-work. The archæologist, Rev. C. W. King, suggests that it may be the work of the “Inimitable Simon,” as he was called, who later engraved dies for the coinage of the Lord Protector, Oliver Cromwell, although he admits that it may have been executed by Vanderdoort, who was commanded in 1625 to make pattern pieces for the coinage of Charles I, at the beginning of the King’s reign.[272] A signet ring used by Kaiser William II is set with a reddish-white onyx, on which has been engraved a shield bearing the German eagle, and surmounted by a crown and the letters, W. II. I. R., Wilhelm der Zweite, Imperator Rex. This signet belonged to the present Kaiser’s grandfather William I, and has been adapted to the present monarch’s use.