Alun Lewis

I was reading plays for BBC Wales Drama Department some years ago and a sort of play arrived written by a Mrs Lewis from North Wales. It was not good enough to recommend for broadcasting but what was interesting was that the woman was the mother of Alun Lewis. I can't recall if that information was in the play itself or in an accompanying letter but I wrote to her and enjoyed a short correspondence for a few weeks.
Alun Lewis died in the 2nd World War at the age of 29 (it has been claimed "by his own hand"); at the time he was on duty in Burma having been in the army for four years.
I believe his mother wished to write something that would serve as a sort of memorial to her son.
He is not a well-known poet though he did achieve some fame with a volume of his poems published after his death (Robert Graves wrote an introduction to the book).
His most famous poem begins:

"All day it has rained, and we on the edge of the moors
Have sprawled in our bell-tents, moody and dull as boors,
Groundsheets and blankets spread on the muddy ground
And from the first grey wakening we have found
No refuge from the skirmishing fine rain
And the wind that made the canvas heave and flap
And the taut wet guy-ropes ravel out and snap....."