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    Archive NumberTitleLevelDescriptionMediumImagesArchive Number6514436Title70_249_0107 - Ordnance Survey Vertical Aerial Photography CollectionLevelItemDescriptionBlack and white aerial photograph of Cefn Du quarry, taken by the Ordnance Survey on 19th June 1970 at an altitude of 7500 feet. Grid reference SH5559. Print enlargement (c. 20") taken from 9" film roll.MediumPhoto.ImagesnArchive Number6145843Title945131_43 - RCAHMW Black and White Oblique Aerial PhotographsLevelItemDescriptionRCAHMW Black and white oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken by C.R. Musson, 02/05/94MediumPhoto.ImagesnArchive Number6145848Title945131_45 - RCAHMW Black and White Oblique Aerial PhotographsLevelItemDescriptionRCAHMW Black and white oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken by C.R. Musson, 02/05/94MediumPhoto.ImagesnArchive Number6145844Title945131_46 - RCAHMW Black and White Oblique Aerial PhotographsLevelItemDescriptionRCAHMW Black and white oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken by C.R. Musson, 02/05/94MediumPhoto.ImagesnArchive Number6145847Title945131_47 - RCAHMW Black and White Oblique Aerial PhotographsLevelItemDescriptionRCAHMW Black and white oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken by C.R. Musson, 02/05/94MediumPhoto.ImagesnArchive Number6145842Title94_CS_1023 - RCAHMW Colour Oblique Aerial PhotographsLevelItemDescriptionRCAHMW colour slide oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken by C.R. Musson, 02/05/94MediumPhoto.ImagesnArchive Number6145849Title94_CS_1025 - RCAHMW Colour Oblique Aerial PhotographsLevelItemDescriptionRCAHMW colour slide oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken by C.R. Musson, 02/05/94MediumPhoto.ImagesnArchive Number6145845Title995099_46 - RCAHMW Black and White Oblique Aerial PhotographsLevelItemDescriptionRCAHMW Black and white oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken on 20/08/1999 by Toby DriverMediumPhoto.ImagesnArchive Number6145846Title99_CS_2040 - RCAHMW Colour Oblique Aerial PhotographsLevelItemDescriptionRCAHMW colour slide oblique aerial photograph of Chwarel Cefn-du Slate Quarry, Llanberis, taken on 20/08/1999 by Toby DriverMediumPhoto.ImagesnArchive Number6329412TitleAP_2006_2802 - RCAHMW Colour Oblique Digital Aerial PhotographsLevelItemDescriptionRCAHMW colour oblique aerial photograph of Chwarel Cefn-Du Slate Quarry. Taken on 18 July 2006 by Toby Driver.MediumPhoto.Imagesy