Third Order Fig 1- Plan Cc are the holes in the plinth to admit the posts of the velum Fig 2- Elevation () aa are spouts - Stuart James & Revett Nicholas - 1816, 1794

James stuart & nicholas revett. The antiquities of athens measured and delineated by james stuart f. R. S. And f. S. A. And nicholas revett painters and αrchitects, vol. Iii (ed. Willey reveley), london, john nichols, 1794. Date: 1794.