Part of the story of the cabin's construction is use of this mortise and tenon joint. In traditional timber framing the woodworking joint was commonly used to join adjoining pieces connect at an angle of 90°. Workers found these details while dismantling the 18th-century slave cabin piece by piece before shipping it to the Smithsonian's new National Museum of African American History and Culture in Washington, D.C. (Stephen Morton for The New York Times)
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