AUSTIN, TEXAS.- Robert Faires of austinchronicle.com reported that "when the National Gallery of Art in Washington, D.C., was looking for artwork to include in its exhibition "The Cubist Paintings of Diego Rivera: Memory, Politics, Place," it came calling on Austin. Seems the LBJ Library and Museum had a fine example in its head-of-state gift collection: a 1915 oil painting titled Still Life With Gray Bowl that Mexican President Gustavo Díaz Ordaz presented to Johnson during his presidency. Alas, the LBJ wasn´t inclined to loan its Diego because it is a head-of-state gift, but then the National Gallery offered to replace the painting with one of its own Rivera works for the duration of the show - one that´s never been displayed publicly.  The presidential library agreed to the swap, and on March 2, a truck rumbled up to the LBJ, dropped off Montserrat, a 1911 work in the pointillist style painted by Rivera while he was living in Paris, and carried away Still Life With Gray Bowl for display in D.C. April 4-Aug. 8 and in Mexico City (at the Museo de Arte Moderno) Sept. 19-Jan. 16. Montserrat, which came from the collection of Eugene and Agnes Meyer (parents of the late Washington Post publisher Katherine Graham) and was given to the National Gallery in 2001 by their daughter Elizabeth Meyer Lorentz, goes into the Gifts of State exhibit this month with a special label explaining its presence. For more information, call 721-0200 or visit www.lbjlib.utexas.edu."