This is a beautiful and very moving piece of writing taken form the book by Helen Thomas 'World Without End.
See link:
http://www.independent.co.uk/news/world/world-history/history-of-the-first-world-war-in-100-moments/a-history-of-the-first-world-war-in-100-moments-helen-thomass-final-farewell-to-her-husband-the-poet-edward-thomas--i-stood-at-the-gate-watching-him-go-he-turned-back-to-wave-until-the-mist-and-hill-hid-him-9468425.html