A natural sandstone billboard... John Buchanan April 19, 2021 sits beneath Convent Mesa, on the far right, in the image immediately below. Three of the four sides of the nearly cubic block are adorned with dozens of petroglyphs, two of which are included here, each about 30 cm across. Early local explorer Mat A. Martin inscribed his name on the deeply shadowed eastern side of the block. Width of view is about 1.5 meters.