A silly, but harmless, video here by Sotheby’s Jonquil O’Reilly ahead of their Old Master sale in New York on 29 January. It’s about fashion and style in pictures: what does, say, a certain hairstyle tell us about the date of a picture, or what does a toga tell us about who’s who in a Carpaccio? And what’s the deal with the chaps in tights? Watch the video to find out . . .