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Amgueddfa Cymru – Museum Wales
Blueprint on off-white paper. Some details are handwritten in red ink. A table entitled 'E.W. Steam Generators'[?]'. Under the column title 'job' there are 5 company / committee names for which statistics are provided, one of which is the Powell Duffryn Steam Coal Company. Contained within a moroon hardback file with all other documents under accession number 85.184I/4.
