FORT WORTH, Texas (AP) -- One of the largest ranches in the U.S. and an icon for Texas horse and cattlemen has been listed for $725 million, marking the end of a decades-long courtroom battle among the heirs of cattle baron W.T. Waggoner, who established the estate in 1923. The estate includes the 510,000-acre ranch spread over six North Texas counties, with two main compounds, hundreds of homes, about 20 cowboy camps, hundreds of quarter-horses, thousands of heads of cattle, 1,200 oil wells and 30,000 acres of cultivated land, according to Dallas-based broker Bernie Uechtritz, who is handling the sale...