Letter from Thomas Gold to Professor Harold C Urey, Department of Chemistry, Revelle College, Univerity of California, PO Box 109, La Jolla, California Thanks him for his letter of 29 June, He thoght Urey knoew that the point he makes about te maria being made out of rubble initially was exactly what Gold had been thinkin and has often expressed both in private and in public. he is sending a reprint fromt eh Philosophical Society in which he has marked the passage referring to this. Discusses this further. 15 July 1971