Fresh off Sotheby's strongest Frieze-week sales ever, James Sevier discusses the state of the Contemporary art market. London was filled with eager buyers who packed the fairs and auctions. More than $257 million was spent at auction and there's no telling how much more changed hands at the various fairs and galleries in London. In this conversation, Sevier talks about the mood in the market, the effect of the cheaper pound on how consignors behave and the strong demand for artists like David Hockney, Frank Auerbach and Caroline Walker.