Henry T. GWILLIAM - Coal Mining Accident (General)
http://www.cmhrc.co.uk/site/disasters
Henry T GWILLIAM 1914 can be found on the above site.
'Taking out a pillar of coal on the rise side etc etc. a piece of rock 12 foot long, 7 foot side and 5 foot thick, fell from the roof - 2 killed
Owner, H.Crawshay & Co