I have received a copy of the letter you sent to Professor Jeffcott who is away at present. Thankyou for informing us where the matter has got to - we have given considerable thought to this issue and this has been communicated to you in the letters from Professor Jeffcott. I think it is a retrograde step which will have temporary success and with the inevitable attenuation of virus and the selection of resistant stock the Australian agricultural departments will simply be repeating history.