He showed it to an expert, who found the needle-and-thread theory "entirely original, " says Mr. Humphrey, whose own scholarly work has examined arenas for Roman chariot racing.

WSJ: On Pins and Needles: Stylist Turns Ancient Hairdo Debate on Its Head

Unless his readers look up the original article, they may not realize that he is is merely promoting his own work, in a highly biased way.

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