https://twitter.com/RobGMacfarlane/status/998293039394250753
see also
https://www.telegraph.co.uk/books/what-to-read/passion-poetryof-nature-writer-robert-macfarlane-quest-reconnect/ (The Old Ways: A Journey on Foot, kindle 2020-5-22)
https://en.wikipedia.org/wiki/Mountain_(2017_film)
https://en.wikipedia.org/wiki/Robert_Macfarlane_(writer) (b 1976)