Letter from Thomas Gold to Mr Walter Sullivan, Science Editor, The New York Times, 229 WEst 43rd Street, New York, New York States that of course he wa very happy to see his note on the levitating moondust. Sullivan's remark that it is now known that the plains are lava beds and not deposits of small particles - this is only 'known' because it is 'known ' that particles cannot do what you just described. There is no other proof. 24 April 1975