"Jim,Ewan did not collect industrial songs"
Oh dear:
Ewan and Joan collected Four Loom Weaver from Beckett Whitehead and Fourpence a Day from Mark Anderson for a programme called 'The Ballad Hunters'.
There were others but the BBC didn't keep copies of them
Ewan and Peggy recorded mining songs from Jack Elliot and put an LP of the family out on Folkways as well as using them for 'The Big Hewer'.
Where do you get this stuff Dick?
I have no idea what your huge cut-'n-paste is about - I've made my enormous admiration of Séamus's work crystal clear - couldn't begin to tell you of my admiration for his musicianship - one of the finest nights of music I ever attended was at our 'Tradition Club' in Hammersmith, where the room was crammed with his peers - Bobby Casey, Tom McCarthy, Raymond Roland, Roger Sherlock, Paddy Taylor - Seámus didn't put a finger wrong - he daren't have done in that company; you could have walked on the atmosphere   
Nobody "underestimates' Seámus's work least of all me - so stop creating red-herrings.
The fact that he was in no way involved in industrial songs (other than those MacColl wrote for 'Song of a Road' and 'The Irishmen') remains a fact.
Why are you labouring this point? I really am making an effort not to be rude here.
Jim Carroll