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The tree-lined Louisiana Street just west of downtown anchored the fashionable residential neighborhood in the late nineteenth century. L. A. Scott, an agent for the Houston and Texas Central Railway, purchased an existing one-story house when he moved to McKinney in 1880, becoming an influential business and civic leader in the city. He and his wife, Louise, expanded their residence in 1902, adding a second story and updating it stylistically into a flamboyant blend of Queen Anne and classical. A two-story portico with two pairs of fluted Ionic columns and foliated, plaster ornamentation in the gable stands beside the older three-story octagonal tower with a bell curve roof.