§ Mr. Archie Hamilton
Prior to the Soviet statement on their chemical warfare (CW) stockpile made in December 1987, the only information available to us on the size of their CW capability were estimates based upon sensitive information.
The Soviet Union claims to possess approximately 50,000 tonnes of CW weapons "in terms of toxic agent". The precise scope of its claims is unclear and the figure is substantially lower than our current classified estimates of the size of their stockpile. We have made it clear to the Soviet Union that it will have to give more information if we are to have any confidence in its claim.