He brought a P.T. Barnum-like showmanship to Sotheby’s, where he sold items like Babe Ruth’s bat and a research rover that had been left behind on the moon. Redden, David N, Auctions, Sotheby’s, Deaths (Obituaries) He brought a P.T. Barnum-like showmanship to Sotheby’s, where he sold items like Babe Ruth’s bat and a research rover that had been left behind on the moon. NYT > Business