...Box 13. :)
http://www.texasobserver.org/showArticle.asp?ArticleID=672BALLOT BOX THIRTEEN The last vestiges of the Dukedom of Duval were laid to rest when Archer Parr, former Duval County Judge, died on November 2. His death may also mean the loss, once and for all, of the secret of Ballot Box 13, the infamous "missing" South Texas ballot box, which many believe allowed LBJ to steal the 1948 election that put him in the U.S. Senate and rescued his flagging political career. Like other family members, Archer Parr had an uneasy acquaintance with the law, serving three years of a ten-year federal sentence on charges related to mail fraud. In 1978 he was convicted for stealing county equipment and services and given ten years' probation.
But the convictions were minor parts of the family history, compared to the family's legacy as political bosses in South Texas. His grandfather, State Senator Archie Parr, ran a legendary South Texas political machine. Upon Archie's death in 1942, his son George took over the family political business, despite a conviction for tax evasion in the Thirties. That was cleaned up a little later, when Harry Truman granted George a presidential pardon. Truman’s benevolence was a fortunate turn of events for LBJ, because George went on to become County Judge in Duval County. Judge Parr was running the county when, in 1948, Lyndon Johnson won his senate seat, beating Coke Stevenson only after 202 missing votes were found in Box 13 (which was actually just over the county line, in Jim Wells County, but well within the powerful Parr family fiefdom). The Parrs were said to have "taken an interest" in the electoral outcome. George Parr continued to rule the politics of the county until 1975, when, faced with yet more federal charges, he committed suicide. His nephew Archer had been serving as County Judge since 1959. Archer would have stepped into his uncle's shoes as county boss were it not for the inconvenience of his conviction that same year.