Letter from Thomas Gold to Professor J W McGowan, Department of Physics, University of Western Ontario, London 72, Ontario, Canada McGowan's invitation on the telephone sounded rather different from that in the letter, and he is not clear that he understands the situation. Is Gold to understand that he is not now invited to give the Elizabeth Laird memorial lecture? Asks McGowan to let him know the details of the invitation. 27 August 1973