17 August 1967: Engineering Difficulties, Washington British Embassy Circuit

For their part, the Foreign Office responded positively to the Commanding Officer’s suggestions, as is evidenced in this telegram.  

Document Viewer

Fixed Communications - Hydra Telegraph Relay System - Relocation of Hydra - Plans and Policy, RG24, S-2723-2, Vol. 2, Library and Archives Canada (LAC)

1966-1971: Heads and Tails: The End of HYDRA?
17 August 1967: Engineering Difficulties, Washington British Embassy Circuit