They have received a reply from Professor Pirani regarding alterations which could be made to The ABC of Relativity. Pirani replied, "I have now had time to examine with reasonable care the alterations which ought to be made before 'The ABC of Relativity' is again reprinted. A considerable number of changes should be made, particularly in Chapter eleven, which deals with the current state of astronomical knowledge, where there has been rapid progress over the last decade."