Eric Litke, an assistant to Mr. Lewitt  in 2001-2006, will present an overview of the artist's ''wall drawing'' murals, which used a graphite-scribbling technique. Meanwhile, there's a current exhibition of Mr. Lewitt's graphite wall drawings at Barbara Krakow Gallery, Boston.

Mr. Litke's lecture will be at Concord Art, 37 Lexington Rd., Concord, Mass., on Jan. 19, starting at 6:30 p.m.
 

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