This is an old pal of mine who is getting pretty frail and also has Parkinson's. He was burgled some time ago and thinks his Log Book was stolen at that time. In his present state of mind I can't help thinking he may have just mislaid the thing but he's got all his marbles and may be right so I promised to do what I can to publicise his loss wherever I can. Naturally he is very keen to retrieve the document and I've been guided to this site by another forum which thinks it might be an idea to mention it.
Hope someone can come up with something!