The finest Jacobean jewel in existence is the famous miniature-case known as the Lyte Jewel, now in the Waddesdon Bequest in the British Museum. Miniature-cases of gold elaborately enamelled, with hinged fronts often set with jewels, were as much in vogue as in Elizabeth's time; and records show that many precious "picture cases" of the kind were made for James I as presents to personal friends or to ambassadors. The cover of the Lyte Jewel is of open-work, filled with the letter R, with diamonds on the outside and brilliant enamel within. The back is a white enamelled plate with a design in fine gold lines and ruby enamel, the edge being enamelled alternately ruby colour and sapphire-blue. Within is a portrait of James I ascribed to Isaac Oliver. The first owner of the jewel was Mr. Thomas Lyte. This gentleman drew up a long pedigree of King James I's ancestry and presented it to the King, who was so much pleased with it that he rewarded Mr. Lyte with "his picture in gold, set with diamonds, with gracious thanks." The jewel passed from the Lyte family some generations ago into the hands of the Duke of Hamilton. At the dispersal of the Hamilton Palace collection it was bought for the sum of £2,835 by Baron Ferdinand Rothschild, who bequeathed it with his other art treasures to the British Museum. A contemporary portrait of Thomas Lyte, dated 1611, in the possession of Sir Henry Maxwell Lyte shows him wearing it suspended from a brown ribbon round his neck. The jewel is the same, save that the drop at the bottom, now a single pearl, was originally trilobed. This exquisite jewel was probably the work of one of the court jewellers mentioned above. The design on the back, which corresponds in style with engravings of Daniel Mignot and the other earlier designers in the "silhouette" manner, exemplifies the influence exercised by the ornamentists on all the jewellery of the period (Pl. XLI).