There are several very interesting miniatures in the Pierpont Morgan Collection which, although they cannot be given to Holbein himself, are certainly of his school and period. One of the finest represents a Baseler named Arnold Franz, a man with a brown beard and moustache, dressed in black.[554] It is in a richly-enamelled gold frame with pendant pearls, and the sitter’s age, “AET. 32,” enamelled on the front, and on the reverse, “Arnold Franz, Holbein Pinx.” It was procured at the sale of a collection in Basel, and was stated to have been in the possession of the descendants of the sitter ever since it was painted. There was also an unbroken family tradition that Holbein himself had painted it, and that Franz, said to have been a printer and a friend of Froben’s, was intimately acquainted with the artist. The Franz family, now extinct, are also said to have possessed for many years a letter from Holbein to his friend, in which the miniature is mentioned, but the document has been lost.[555] A second miniature in Mr. Morgan’s collection is a portrait of Niklaus Kratzer, and is evidently by the same hand as the one of Arnold Franz. It is not a reduced version of the Louvre picture, which was painted in 1528, but appears, in Dr. Williamson’s opinion, to have been painted some years earlier than that date, though, if that be the case, it is not very likely that Holbein was its author. The face is nearly in profile, to the left, and the astronomer is wearing the customary fur-lined black coat and black cap, and a gold chain round his neck. In his hand he holds a brass armillary sphere. A third miniature, in the same possession, which has considerable affinity in style to the two just mentioned, represents Charles Brandon, Duke of Suffolk. It was formerly in the possession of the royal house of Holland, and afterwards in the Propert and Tomkinson collections. Dr. Williamson suggests that some of the Holbeinesque miniatures, such as these, which exist in considerable numbers, may have been the work of Hans Mielich (1515-1572), of Munich, who painted portraits and miniatures of some merit, and was for a time court painter to the Duke Albrecht V of Bavaria. There is no record, however, of any visit paid by him to England. Others may be possibly the work of such painters as Thomas and John Bettes and Guillim Stretes, who are dealt with in a succeeding chapter.[556] Footnote 554: Pierpont Morgan Catalogue, No. 3, and Pl. iii., No. 1, and colour plate, _édition de luxe_, No. 3. Footnote 555: Williamson, _History of Portrait Miniatures_, vol. i., Addendum, p. xx. Footnote 556: _Burlington Magazine_, vol. viii., February 1906, p. 356, and vol. ix., July 1906, p. 278.