Letter from Thomas Gold to Dr Eugen H Levy, Laboratory of Astrophysics ans Space Research, Enrico FErmi Institute, The University of Chicage, 933 East 56th Street, Chicago, Illinois Regrets very much that they are not ble to make another post doc appointment. If the funding situation improves will let him know. Thought he might like to see the paper Godl wrote in 1965 ont he same subject and giving the same explanation as Levy presents. Gold supposes it was published in too obscure a place. The enclosure was of 'The Expansion of a Relativistic Gas into Intergalactic Space' No copy attached 18 February 1971