First native-born cattle king of Texas. Eldest of several rancher brothers. At age 12 "made a hand" on East Texas ranch of father, Rev. Geo. W. Slaughter. By 17 made his own trades in lumber, wheat, cattle. In 1856 moved his cattle to Palo Pinto County, on his first West Texas ranch. During the Civil War, he supplied beef to Confederacy and served in frontier regiment, to prevent Indian attacks. After the war he led cattlemen in aiding economy of bankrupt Texas by securing cattle markets. A fat steer bought for $6-8 in Texas by middleman was sold for $30-40 at shipping point. In 1867 he sold 300 head at record $35 and led the way to rancher marketing. Kept his love for trailing, even after he became millionaire. He also pioneered improvement of Texas Longhorns by use of champion Shorthorn and Hereford bulls. In Eastern speeches, he advocated beef on daily diet. To curb rustlers and establish efficient roundups, he helped organize first cattle raisers association. His 89,000-acre "Running Water" spread in Hale and Lamb counties was part of 1,000,000 acres ranched. He was a banker, active churchman, philanthropist. His descendants have erected a memorial center bearing his name on the campus of Wayland College here. 1965