Idris Davies (1905-1953), his best known poem must be "Bells of Rhymney", thanks to Pete Seeger's setting it to music. I like this one, not least because it mentions Hull. The Hull dockers were always generous to striking miners, though it was the men of the Yorkshire minefields who benefitted most. I hadn't seen this poem for some time and had to search the net for it. I found it here, along with a couple of others and some biographical information. In my memory this is called "Send out your pigeons, Dai", but maybe it was homing pigeons. I'll stick with my memory, true or false -

SEND OUT YOUR PIGEONS, DAI

Send out your homing pigeons, Dai,
Your blue-grey pigeons, hard as nails,
Send them with messages tied to their wings,
Words of your anger, words of your love.
Send them to Dover, to Glasgow, to Cork,
Send them to the wharves of Hull and of Belfast,
To the harbours of Liverpool and Dublin and Leith,
Send them to the islands and out of the oceans,
To the wild wet islands of the northern sea
Where little grey women go out in heavy shawls
At the hour of dusk to gaze at the merciless waters,
And send them to the decorated islands of the south
Where the mineowner and his tall stiff lady
Walk round and round the rose-pink hotel, day after day after day.
Send out your pigeons, Dai, send them out
With words of your anger and your love and your pride,
With stern little sentences wrought in your heart,
Send out your pigeons, flashing and dazzling towards the sun.
Go out, pigeons bach, and do what Dai tells you.