Benton County Trivia   Hid Gold in Buggy - William McIlroy, one of the first bankers at Fayetteville, left $30,000 in gold hidden under the seat of a broken-down buggy on a mountain road in the Boston range in northwest Arkansas for nearly ten days before he returned to get it.  He was moving it from his store in town to his brother's farm at the outbreak of the Civil War when occupation of Fayetteville by Federal troops was imminent.