Ronald G. Thorn was a cadet engineer with the SEC on the Kiewa Hydro Electric Scheme. The SEC employed young engineers as cadets to gain experience in their profession. As a cadet he took notes on his work for future reference. Refer to KVHS 1148Ronald George Thorn cadet engineer with the SECV on the KHES 1948 - 1950 doing overhead line re-construction and maintenance plus electrical design and drawing work.Leather cover with 2 silver rings. Pages A-Z with additional fold out pages of diagrams. Some pages have handwritten notes.Inside on front cover "R.G.Thorn / H.V. Section/ Yarraville Lab/ SEC / OE Section Y.T.S. R.T.S./ N.P.S. / Stamped 'Bogong" / N.P.S. / Sub/E / E.P.E."kiewa hydro electric scheme, r.g.thorn, cadet engineers, electrical design