LefelGroupDisgrifiadMaterial relating to St. Donat's Castle: much of it produced for the publication of a guide-book.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348529
LefelGroupDisgrifiadMaterial relating to Johns' contribution to the Caernarvonshire Inventories.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348928
LefelGroupDisgrifiadMaterial relating to Johns' guide-book to Caerphilly Castle publication.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348635
LefelGroupDisgrifiadMaterial relating to Johns' article 'The Celtic Monasteries of North Wales', published in Transactions of the Caernarvonshire Historical Society, Vol. 21, 1960, pp.14-43 .ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348797
LefelGroupDisgrifiadMaterial relating to Johns' contribution to the Glamorgan Inventories, Domestic Architecture volumes.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348817
LefelGroupDisgrifiadMaterial relating to other people's articles; some of which include Johns' notes/ comments on.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348803
LefelGroupDisgrifiadMaterial relating to Johns' contribution to the Glamorgan Inventories, Early Castles and Later Castles volumes. The group also includes material on other castles in Wales - presumably for comparative/ background purposes.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348676
LefelGroupDisgrifiadMaterial relating to Caernarvon Castle.ArchifCNJ - C.N. Johns CollectionDyddiadRhif Archif6348603
