Notes ... E. Vanderpool H.Α. Thompson ... 3201 3400 ... 1954, 1961
View of the deep central basin, showing trace of overflow pipe ... AMS south 3302 Horizontal (normal) ... 18 Jul 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
