The Hieron of Athena Chalkioikos was identified and to a large extent excavated in 1907, by the late Mr. Guy Dickins, who completed the task in the following year. Accounts of these campaigns, and of the principal finds, were published by him in the Annual (xiii. pp. 137–154, and xiv. pp. 142–146, respectively). This undertaking was practically limited to the thorough exploration of the area enclosed within the wall of the Hieron (B.S.A. xiii., l.c., Fig. 1), and except for the uncovering of the south face of the south wall, and for one trial trench about twenty metres in length, running southwards from the centre of this wall, no excavation took place to the south of the Precinct, in the area contained between it and the retaining-wall of the cavea of the theatre below. As this trench had yielded a large quantity of pottery, including fine fragments of the local Geometric style, a systematic exploration of this area seemed a duty, to be undertaken without delay, when operations were resumed in 1924.
Work commenced on April 7th, 1924, and lasted until the end of the season (May 31st); in 1925, from April 13th to May 30th. The number of men employed seldom exceeded ten, though about sixteen were at work in the second half of May 1924.