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A memorandum detailing the visit of HRH Princess Margaret and the Earl of Snowdon to Dinorwig Quarry on the 17 May 1962. The memo provides details about which parts of the quarry the royal party was visiting, at what time, and with who. As the memo records the different departments / galleries they royal party were to visit it is evidence of which parts of the quarry were still in operation in May 1962. The following are noted – Tile Plant, Diamond Saw Shed, Hafod Owen, Wellington Shed, Brick Plant, Despatch Yard, Mills, Sinc Penrhydd. The memo details that the royal part were met by Sir Michael Duff (quarry owner), Mr T.E.O. Williams (managing director), Mr W.H. Jones (quarry manager), and Mr T. Morris (chief engineer).

This memorandum belonged to Mr Owen William Humphreys, one of Dinorwig Quarry’s stewards. Mr Owen William Humphreys worked at Dinorwig Quarry. He started working at the quarry when he was 14 years old, at Ponc Pendiffwys. In 1946 he became a quarry steward at Ponc Isaf Braich. He was then moved to Muriau (or Lower Wellington as that section of the quarry was also known), and then to the section of the quarry known as Lower Garrett. He remained a quarry steward until August 1969 when Dinorwig Quarry closed.