ABSTRACT
WEC at Delhi was part of a comprehensive array of Allied sigint units, large and small, which co-operated to ensure good coverage and exchanged news when progress was made. Furthest back were the very large units at Bletchley Park and Arlington Hall, Virginia, formerly a spacious girls school. Both of them tackled the really intractable problems of high-grade crypto systems that had never yet been broken, and fundamentally new materials which had lost us the ability to read a hitherto broken system. At a halfway stage came the large American and British units at Delhi, the former called 'US 8', the latter WEC with its two main out-stations: Western Wireless Sub-Centre at Bangalore in south India and Eastern Wireless SubCentre at Barrackpore near Calcutta. These were concerned with Japanese Army and Army Air traffic.
