On the suggestion of Rev. L. P. Murray, and influenced by the discoveries made at Stonehenge and elsewhere by 0 means of air-photography , the Ancient Monuments Advisory Committee for Northern Ireland, at a meeting held 27 April 1927, agreed to pursue similar investigations in the Province. The Ministry of Finance, which in regard to Ancient Monuments corresponds to H.M. Office of Works in England, gave its support and asked the Air Ministry for its cooperation. This was readily accorded, and 502 Ulster (Bombing) Squadron of the Royal Air Force stationed at Aldergrove, co. Antrim, was instructed to give assistance, so far as was consistent with its ordinary duties. Valuable help was given by Wing Commander A. Claud Wright and the Squadron under his command, and the results have been decidedly interesting.