The visual-arts section of the Houston Festival last spring, curated by Fletcher Mackey, focused on outdoor sited works; fourteen such pieces sprouted along the Buffalo Bayou, a meandering stream that runs from the elegant Memorial district into the downtown. A half-dozen artists were brought from both coasts, and others were commissioned from Houston or elsewhere in Texas. They were faced simultaneously with a setting of considerable natural charm and with the awesomely growing Houston downtown skyline, which hovered in the background of those works that did not hide from it. In addition to