"As for Mr. Kennedy's administration--we must wait to see what it does; so far, what we see is Laos and more Polaris missiles. The spread of nuclear weapons to new Powers immensely increases the danger of nuclear war and therefore the likelihood of disaster. Chemical and biological warfare are as much to be condemned as nuclear warfare. The only answer to all dangers is the outlawing of war." BR encloses a copy (not present) of a recent speech. In a postscript he states: "Kindly note that I do not advocate unilateral nuclear disarmament for the U.S." 

The missing enclosure was BR's first Birmingham speech of 1961, titled in the pamphlet published later Win We Must. The letter was offered in this auction: Bid Now: RUSSELL, BERTRAND. Typed Letter Signed, to "Dear Mr. Silverstein," - June 4, 0121 10:30 AM EDT (invaluable.com).

Record 29263 is a typed carbon of this letter, and record 127129 is its dictation, dated 3 days earlier.