Mr. James Edward Nix

http://www.oldcitypark.org/James.aspx

Excerpt:

His own ill health led James Nix abandon full-time farming in the spring of 1858 and join Wade Hampton Witt and Alexander Perry as a partner in the Witt's mill and store located at Trinity Mills near the Denton County border.
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Vanished Glory of Trinity Mills Recalled as Town Century Old

http://freepages.history.rootsweb.com/~jwheat/trinitymills.html

Excerpt:

OLD TIMBERS STILL SERVE -- Timbers from the old Witt mill, still sound after a century of service, support a Dallas County barn.
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"Forting Up" on the West Texas Frontier

http://www.texasalmanac.com/history/highlights/forts/

Excerpt:

In 1858, W. C. McGough, living in southern Eastland County, traveled to Witt's mill on the Elm Fork of the Trinity River in present Denton County
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Sixty Years in Texas--By George Jackson--(Note: Use Google Book Search mentions Witt's Mills)

http://www.google.com/
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Gay