Hi all, I was lucky to have a bit of a chat to Tristan Gooley who wrote the natural navigator. I wa able to offer hims a peice of information that he had never heard before about how a tree can indicate direction. Tristan was kind enough to mention me on his blog, so thanks to him. I thought I would put a link for his book up here. I bought it after chatting to him and really enjoyed it. Highly recommended.