Discovering Agnes Martin's artistic roots

This undated image provided by the Harwood Museum of Art shows Agnes Martin's "The Bluebird," Roswell Museum and Art Center Collection. This will be exhibited in "Agnes Martin: Before the Grid," opening Feb. 25, 2012 at the Harwood in Taos, N.M. Photo: Courtesy Of The Harwood Museum Of Art / AP

This undated image provided by the Harwood Museum of Art shows Agnes Martin's "The Bluebird," Roswell Museum and Art Center Collection. This will be exhibited in "Agnes Martin: Before the Grid," opening Feb. 25, 2012 at the Harwood in Taos, N.M. Photo: Courtesy Of The Harwood Museum Of Art / AP

This undated photograph provided by the Harwood Museum of Art shows American abstract painter Agnes Martin in her studio. The exhibition "Agnes Martin: Before the Grid" opens Feb. 25, 2012 at the Harwood in Taos, N.M. Photo: Courtesy Of The Harwood Museum Of Art, Mildred Tolbert Archives / AP

This undated image provided by the Harwood Museum of Art shows Agnes Martin's "New Mexico Mountain Landscape, Taos," Raymond Jonson Collection. This will be exhibited in "Agnes Martin: Before the Grid," opening Feb. 25, 2012 at the Harwood in Taos, N.M. Photo: Courtesy Of The Harwood Museum Of Art / AP

In this Feb. 13, 2012 photo, curator Jina Brenneman looks through archives related to American abstract painter Agnes Martin at the Harwood Museum of Art in Taos, N.M. The exhibition "Agnes Martin: Before the Grid" will feature more than 30 works by Martin along with letters and other documents related to the artist. Photo: Susan Montoya Bryan / AP

This undated photograph provided by the Harwood Museum of Art shows American abstract painter Agnes Martin in her studio. The exhibition "Agnes Martin: Before the Grid" opens Feb. 25, 2012 at the Harwood in Taos, N.M. Photo: Courtesy Of The Harwood Museum Of Art, Mildred Tolbert Achives / AP

In this Feb. 13, 2012 photo, curator Jina Brenneman looks through archives related to American abstract painter Agnes Martin at the Harwood Museum of Art in Taos, N.M. The exhibition "Agnes Martin: Before the Grid" will feature more than 30 works by Martin along with letters and other documents related to the artist. Photo: Susan Montoya Bryan / AP