Letter from Thomas Gold to Professor Harry Messel, Head, School of Physics, The University of Sydney, Sydney, New South Wales, Australia Will be delighted to see Messel from 10 to 15 October. Is informing the present director at Arecibo, Tor Hagfors, of Messel's intended visit. Doesn't know if Messe can find his way ther, but if he looks closely there are signs on the road leading our of Arecibo towards the site. Gives appropriate telephone number to Hagfors or Dyce. Hopes they both enjoy this magnificent trip. 1 September 1971