Amongst our colour plates are two delightful portraits by him representing _Frederick, King of Bohemia, and his Wife_, who was known in England as the "Queen of Hearts," signed miniatures from the collection of Sir Charles Dilke (Plate IV., Nos. 2 and 3). In the monotone illustrations there appear two remarkable works by this painter from the collection of Mr. Pierpont Morgan. One represents _Philip II., King of Spain_ (Plate III., No. 1), a fine portrait, set in an elaborate locket of rock-crystal and enamel work, upon the reverse of which is a representation of the Crucifixion in grisaille. This portrait has an interesting history, because it was given by the king to the Duke of Osuna, and acquired from the Osuna family, quite recently. It bears a motto which may roughly be translated "He who gives himself, gives not a little thing," words which are eminently characteristic of the pride of the Spanish monarch. The other portrait is of hardly less interest. It depicts _Queen Anne of Denmark_ (Plate III., No. 3), who was painted over and over again by Isaac Oliver, and who can always be readily distinguished by the jewels which she wore on her elaborate high collar or ruff. Amongst them invariably appears a representation of a sea-horse or a dolphin. This may perhaps have some allusion to her Scandinavian ancestry, but, in any case, it was a favourite jewel with the queen, and hardly one of her portraits appears without it. Here, again, the case containing the miniature is of extraordinary importance, because there is good evidence for attributing it to George Heriot, who was goldsmith and jeweller to Anne of Denmark, and was the founder of the great hospital and school which still bear his name in Edinburgh, while to the present generation he is perhaps better remembered as a character in Sir Walter Scott's "Fortunes of Nigel," in which delightful work he appears as "Jingling Geordie." There are portraits of Oliver himself in existence, and a delightful one of his son, while amongst the collection of the Queen of Holland there is one that is said to represent his wife. The most notable series of the works of this painter is perhaps that which is generally known as the Digby series. Walpole tells the story of the discovery of these miniatures. He says that they were in a garret in an old house in Wales, enclosed in ebony and ivory cases, and locked up in a wainscot box, in which they were as well preserved as though only just painted. He was greatly excited about them, and was able to secure the entire collection, first buying from one owner the greater part of the collection, and then securing by a second purchase the remainder from the lady who shared them with the other heir. They were all sold at his sale at Strawberry Hill, and some of the finest of the portraits passed into the collection of the late Baroness Burdett-Coutts, others went to Mr. Holford, and many back again to the Digby family, who would gladly have purchased the whole, but were unable to afford the prices paid by the Baroness Burdett-Coutts, then Miss Angela Coutts. One little portrait was bought by Mr. Wentworth Dilke, and now belongs to Sir Charles Dilke, it represents one of the sons of Sir Kenelm Digby, and is a charmingly graceful little work, by the kind permission of its owner illustrated in these pages (Plate IV., No. 1).