Onllwyn no 1 Colliery overman's measuring book (1908), and letter from Glamorgan County Council Education Department to Lieutenant Howell Jeffreys re interview for post of mining lecturer (1919).
Material relating to Onllwyn no 1 Colliery and Lieutenant Howell Jeffreys
Scope and Content
Administrative / Biographical History
Not known/available at time of completion.
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Finding aid encoded by Julie Anderson June 2003.
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