Chugalug (your #21),
Mike has beaten us to it ! (but thanks for your kind offer, all the same).
How clearly it shows how the best of memories can fail (and mine is certainly not one of them). What I could remember of the poem, I was quite certain of - but it seems that only a few words (and the general idea) were correct. Ah, well.....
Mike, thank you - the D.M. must have a well-organised archive to locate the poem (75 years old) so quickly.
Danny.