| Description | Telling Professor Harrison Brown that, although he is unable to attend the Lunar Conference, he would be happy for the Professor to read out his comments (contained within the letter) on a 'layer of porous material' that he believes 'exists over most areas of the moon and is several meters thick'. He concludes his comments by saying that 'The changes in my outlook are then that I am now more worried about an insecure surface and about large quantities of very finely divided, very loosely compacted and uncemented material which will in the first place provide a serious impediment in exploration'. |