Casgliadau Arlein

Typed in blue ink on off-white paper. E.Ivor David -headed paper. One copy contains notes handwritten in pencil. Two copies, each containing four pages. One copy has notes handwritten in pencil alongside the typed text. A series of questions and answers relating to 'The steam storage system N.48: Matters for Discussion Relative to Cefn Coed Colliery.' Dated 21.4.33. Loose within a green card file with all other documents with accession number 83.184I/67. The file is labelled 'Colliery Boiler Plant B31', 'Cefn Coed Data' and 'Colliery Engineering'.