SA LIFE -- FOR ELDA SILVA -- As a fundraiser for the Esperanza Center, Sandra Cisneros (left) is doing a talk on the history and significance of the rebozo, the traditional Mexican shawl. She is also paying tribute to Maria Luisa Camacho de Lopez (right,) an expert on traditional Mexican costumes, who introduced her to the caramel-hued rebozo her recent novel is named for.  Monday March 15, 2004.  (Robert McLeroy/Staff) Photo: ROBERT MCLEROY, SAN ANTONIO EXPRESS-NEWS / SAN ANTONIO EXPRESS-NEWS