 Hartman's descriptions of his various excavations include an early depiction of the architecture around the principal platform, descriptions of the stone figures he uncovered, descriptions of the architecture of 17 graves found in four different platforms, a description of a "cache" of ceramics in a rectangular sunken chamber, details about an area of concentrated worked stone that may have been a stone cutters work place, a description of a clay pit, and detailed listings of the artifacts found in each grave or other excavation area.During the winter of 1916-1917 Alanson Skinner conducted archaeological excavations at Las Mercedes, Anita Grande, and Costa Rica Farm Site.His excavation notes indicate that he excavated parts of four cemeteries and one "mound" or platform, and lists off the artifacts found in each excavation.