Few American artists have been so identified with one small patch of terrain as Mr. Christenberry was with Hale County, Ala. One of the poorest counties in the state, it was also photographed indelibly by Walker Evans during the Depression. But where Evans made his famous portraits of the Burroughs family as an empathetic visitor from New York, Mr. Christenberry observed the Deep South as a native son, its landscape signifying his ancestral home.