[S428] "1870 United States Federal Census", database with images, Ancestry (https://ancestry.co.uk accessed 6 February 2018), David John citing Year: 1870; Census Place: Provo Ward 2, Utah, Utah Territory; Roll: M593_1612; Page: 281A; Family History Library Film: 553111
[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).