Jeffrey Brackett Potter died at Southampton Hospital on Saturday after a brief case of pneumonia. He was 94. A resident of East Hampton, he was the author of several books, including an oral biography of Jackson Pollock, “To a Violent Grave,” which was published in 1985. He also wrote two works of children’s fiction that were published by Viking Press, “Elephant Bridge” and “Robin is a Bear.” At one time, he ran a marine construction company here, East Hampton Dredge and Dock, whose motto was “Your Bottom is Our Business.”