American archaeologist A. Ledyard Smith visited the ruins in 1949 .
American archaeologist A. Ledyard Smith wrote a chapter about the site in his Archaeological Reconnaissance in Central America , published by the Carnegie Institution of Washington in 1955 .
American archaeologist A. Ledyard Smith visited the ruins in 1949 and wrote a chapter about the site in his Archaeological Reconnaissance in Central America , published by the Carnegie Institution of Washington in 1955 .