Rhif ArchifTeitlLefelDisgrifiadCyfrwngDelweddauRhif Archif6058526Teitl8M_3063_1 - Cadw Registered Files CollectionLefelSub-groupDisgrifiadClosed registered file, ref. no. 8M/3063/1, transferred from Cadw, concerning Penbryn Quarry, Llandwrog, Caerns, vertical steam engine and housing, scheduling. SAM Code CN166 (Descheduled 1973)CyfrwngText.DelweddaunRhif Archif6144121Teitl945129_41 - RCAHMW Black and White Oblique Aerial PhotographsLefelItemDisgrifiadRCAHMW Black and white oblique aerial photograph of Pen-y-bryn, Quarry, Llanllyfni, taken by C.R. Musson, 02/05/94CyfrwngPhoto.DelweddaunRhif Archif6144120Teitl94_CS_1002 - RCAHMW Colour Oblique Aerial PhotographsLefelItemDisgrifiadRCAHMW colour slide oblique aerial photograph of Pen-y-bryn, Quarry, Llanllyfni, taken by C.R. Musson, 02/05/94CyfrwngPhoto.DelweddaunRhif Archif6513744TeitlCSAM_MM_2000_10 - Cadw Scheduled Ancient Monument 35mm NegativesLefelSub-groupDisgrifiadColour photo surveys of scheduled ancient monuments in Caernarfonshire carried out by M.A. Mason, 2000.CyfrwngTwo sheets. Photo.DelweddaunRhif Archif6513747TeitlCSAM_MM_2000_13 - Cadw Scheduled Ancient Monument 35mm NegativesLefelSub-groupDisgrifiadColour photo surveys of scheduled ancient monuments in Caernarfonshire and Anglesey carried out by M.A. Mason, 2000.CyfrwngTwo sheets. Photo.DelweddaunRhif Archif6513782TeitlCSAM_MM_2003_26 - Cadw Scheduled Ancient Monument 35mm NegativesLefelSub-groupDisgrifiadColour photo surveys of scheduled ancient monuments in Anglesey and Caernarfonshire carried out by M.A. Mason, 2003-2004.CyfrwngTwo sheets. Photo.DelweddaunRhif Archif6438463TeitlWSP_11 - Welsh Slate Publication CollectionLefelItemDisgrifiadFigure 78. At Pen y Bryn in Nantlle, water wheels on the hillside powered rod-systems operating the pumps in Twll Balast and Old Pen y Bryn pit. The pumps raised the water to the outflows, which took the water through tunnels to where it emptied into the river on the valley floor to the southCyfrwngGraphic.DelweddauyRhif Archif6438501TeitlWSP_49 - Welsh Slate Publication CollectionLefelItemDisgrifiadFfigur 78. Ym Mhen y Bryn yn Nantlle, pwerai olwynion dwr ar y llechwedd systemau rhodenni a weithredai'r pympiau yn Nhwll Balast ('Pen-y-Bryn Slate Quarry') a'r twll yn y gogledd-orllewin. Codai'r pympiau'r dwr i'r all-lifoedd, a ?i ?'r dwr drwy dwneli i'r man lle y c?i ei ollwng i'r afon ar lawr y dyffryn i'r de. (h) a hawl cronfa ddata Hawlfraint y Goron a Landmark Information Group Ltd (Cedwir pob hawl 2014)CyfrwngGraphic.Delweddauy
