Casgliadau Arlein

Handwritten in pencil on off-white paper. Memorandum paper, used as notepaper. The document has 'Memorandum', 'from:', 'to:' etc. printed in black ink at the top of the document. One side has notes refering to Bargoed Power Station, with the date Nov 1952. On the other side of the document is a sketch and some calculations. Loose within peach card file with other documents relating to Powell Duffryn Electrical System.