Letter from Thomas Gold to Dr S Chandrasekhar, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, 933 East 56th Street, Chicago, Illinois States that of course he completely agrees, and has indeed often explained this exactly in the same terms as Chandrasekhar does in his letter. It is only Gold's attention to scientific etiquette that makes him suggest the 'may' for a possibility, however probable, but with as yet no definitive observation. He does not trouble about the finer points regarding the 'existence' of black holes, namely the fact that in a finite time only a close approximation can be set up. 21 April 1978