Well at 21/Ε (beneath Library of Pantainos).
The clearing of the well was abandoned because of a cave-in of the rock walls. Heavy dumped filling, the proportion of fine black table ware high ... Ca. 440-425 B.C ... Agora XII, p. 398 ... Hesperia 4 (1935), pp. 477-523 ... Agora IV, p. 244.