[S422] David John. Diaries 1856-1908. Digital images with transcripts. L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University (lib.byu.edu/collections/special-collections-miscellaneous/ : accessed 14 February 2018).
[S425] 1841 census of Wales Pembrokeshire Little Newcastle David John; digital image, Findmypast (http://www.findmypast.co.uk : accessed 14 February 2018); citing Class: HO107; Piece: 1446; Book 24; Folio: 5; Page: 5