Notes ... H.Α. Thompson ... 3900 4100 ... 1960, 1961
Northeast annex of the Fountain House after clearing ... AMS southeast 3964 Horizontal (normal) ... 9 Aug 1961
Homer A. Thompson ... A report on the completing of the exploration of the Heliaia, the Southwest Fountain House and the southwest entrance to the Agora, as well as some work of conservation and path-making in the area ... 24 Jul-19 Aug 1961