Archive6424938TitleDS2014_436_001 - Investigators' Digital PhotographyLevelItemDescriptionSouth portal of St Helen's Road tunnel, Caernarfon.MediumPhoto.Imagesy
Archive6424939TitleDS2014_436_002 - Investigators' Digital PhotographyLevelItemDescriptionSouth portal of St Helen's Road tunnel, Caernarfon.MediumPhoto.Imagesy
Archive6022996TitleNMR Site FilesLevelItemDescriptionThree colour prints showing the entrance to the railway tunnel, St Helen's Rd., Caernarvon. Negatives not held.MediumPhoto.Imagesn
Archive6424937TitleDS2014_436 - Investigators' Digital PhotographyLevelBatchDescriptionDigital photo survey of St Helen's Road tunnel, Caernarfon, by Brian Malaws on 19 July 2013.MediumTwo images. Photo.Imagesn
Archive6022997TitleEmergency Recording CollectionLevelSub-groupDescriptionSt Helen's Road Railway Tunnel, Caernarfon; measured drawings received in the course of Emergency Recording case ref no ER/CA/95/11, filed in nprn order.MediumGraphic, Cartographic.Imagesn
