Alfred Thomas Wood was nothing and everything. A century before Ferdinand Demara, "The Great Impostor" of the 1961 Hollywood film of that name, Wood was the Great Absquatulator, a man who roved through the mid-19th century from Halifax, N.S., to New England, Liberia, Great Britain, Ireland, Germany, Montreal, the U.S. Mid-West and the South. He self-identified as an Oxford-educated preacher in Maine and Boston, then as a Cambridge-educated doctor of divinity in Liberia, despi