It is impossible to say in what way Dinteville became acquainted with Holbein, or to whose offices the introduction between ambassador and painter was due. Dinteville counted among his friends more than one of Holbein’s sitters, while he was, no doubt, well acquainted with Niklaus Kratzer through his keen interest in mechanics and the various astronomical and mathematical sciences. He had thus more than one opportunity of seeing examples of Holbein’s skill in portraiture, and it is to be gathered that he conceived a great admiration for it, for otherwise he would not have ordered so large and important a portrait group of himself and his friend. With the exception of the “Duchess of Milan,” the More family group, and the now lost “Fitzwilliam, Earl of Southampton,” of which there is a good copy in the Fitzwilliam Museum, Cambridge, the “Ambassadors” is the only portrait-panel painted by Holbein in England of which there is any record in which the figures are shown both life-size and at full-length. As there is no reference in the State papers of England or France to the semi-secret business which brought George de Selve over to London, the suggestion may be hazarded that he came for the express purpose of having his portrait painted, Dinteville urging him to do so on account of the excellent painter he had discovered. The picture, crowded as it is with intricate accessories, must have taken a considerable time to complete. It was, no doubt, painted in the Ambassador’s own room in Bridewell Palace, and the sitter and the painter must have spent long hours in planning out and arranging the many mathematical and scientific instruments which form so important a feature of the panel, some of which may have been lent by or purchased from Kratzer. The visit of the future Bishop of Lavaur was so short that he can hardly have seen more than the beginning of the work and the finishing of his own head and hands. No doubt Holbein followed his usual practice and made preliminary studies of the two heads, but these drawings have not been traced, although there is a very fine unnamed study in the Windsor collection (Pl. 36 (1))[83] which is supposed to represent Jean de Dinteville, the features showing sufficient resemblance to those of the Bailly of Troyes to induce the suggestion that it represents him at a later date. Both Sir Sidney Colvin and Miss Hervey hold this opinion, as did the late Sir Frederick Burton; but it must be confessed that the resemblance is not very striking.[84] The Windsor drawing is of a man considerably older than the Dinteville of the picture; but the Bailly, after his residence in this country throughout the greater part of 1533, paid only three short visits to London between the years 1535 and 1537. Even if the drawing had been made by Holbein in the last-named year he would only have been in his thirty-third year. A miniature or portrait, painted by Holbein from this drawing, was in the Arundel Collection, and was engraved by