 This wartime role is marked by a commemorative plaque unveiled in 1991.In 1940 it was the site of the assassination of Michael O'Dwyer, former Lieutenant Governor of the Punjab in India by Indian nationalist Udham Singh, as an act of revenge for the 1919 Amritsar massacre.It was the location of the press conference that the Russell–Einstein Manifesto was released in 1955 in response to the threat of nuclear war and humanity destroying itself.