• [S21] Copy birth certificate of Margaret Rebecca de Castilla, born 9apr1860, registered 7May1860 in the Registration District of Hornsey, Middlesex (Robert Atkins Personal Archives, 40).
  • [S38] Webpage Ancestry.com (www.ancestry.com).
  • [S73] Webpage Ancestry.com (Ancestry.com).
  • [S78] Unknown author 'unknown article title', The British Medical Journal, 1, 1991, 25 Feb 1899, 503.
  • [S89] Painting of Mariano de Castilla Portrait, taken by R. Atkins, Perth Western Australia, 2010, Robert Atkins Personal Archives.
  • [S96] Webpage Wikipedia James Florence Burke (http://es.wikipedia.org/wiki/James_Florence_Burke).
  • [S98] E-mails from Jo Broad (e-mail address) to Robert Atkins, 2010 onwards ().
  • [S106] Copy death certificate of John Stephen Ramos de Castilla, died 2 August 1938, registered 5 August 1938 in the Registration District of Cape Town (,.
  • [S107] Website Wedderburn Family Tree (unknown url).
  • [S116] E-mails from Karen Racine (e-mail address) to Robert Atkins, 2010 to 2011 ().
  • [S118] Unknown author, 'Kalgoorlie Western Argus', Kalgoorlie Western Argus, 12 November 1912.
  • [S125] Unknown author, 'Western Mail (Perth, WA : 1885-1954), Thursday 20 November 1924, page 35', Western Mail (Perth, WA : 1885-1954), Thursday 20 November 1924, page 35, 20nov1924.
  • [S135] Unknown author, 'The Brisbane Courier', The Brisbane Courier, unknown date.
  • [S152] Web site, 1811 ().
  • [S213] Circular, Institute of Civil Engineers, England, 1 December 1891,Robert Atkins Personal Archives.
  • [S215] Website Australian War Memorial (http://www.awm.gov.au/).
  • [S259] Certificate of baptism of John de Casilla, 16 July 1824, St John Maddermarket Catholic Chapel, Robert Atkins Personal Archives.
  • [S261] Unknown author, 'birth Son of H Castilla', "     Glasgow Herald (Glasgow, Scotland), Mon Dec 24, 1866, Issue 8414, 24 December 1866.
  • [S276] Copy death certificate of Frederick Castilla, died 23 January 1869, registered 23 January 1869 in the Registration District of Kew, Victoria, Australia , GRO Index Ref: 1555.
  • [S290] Unknown author, 'Caledonian Mercury', Caledonian Mercury, unknown date.
  • [S344] P.H. Atkins No Sequel; The Life and Times of Peter Henry Atkins, privately published by Percival Print & Packaging, Western Australia, 1 (2013) 978-0-646-56925-3.
  • [S357] Website California Passenger and Crew Lists, 1893-1957 (Ancestry.com).
  • [S367] Website Selected U.S. Naturalization Record Indexes, 1791-1966 (Indexed in World Archives Project) (Ancestry.com).
  • [S368] Website California Death Index, 1940-1997 (Ancestry.com).
  • [S369] Website Social Security Death Index (Ancestry.com).
  • [S370] Website Canada, Ocean Arrivals (Form 30A), 1919-1924 (Ancestry.com).
  • [S429] Copy death certificate of John Castilla, died 22 february 1846, registered 23 february 1846 in the Registration District of Bow and Bromley (, 243).
  • [S449] Aaron Burr Political Corresponence and Public Papers II, Princeton University Press, Princeton, USA, unknown edition (1983) unknown isbn.
  • [S462] Various authors, 'Western Mail (Perth, WA : 1885-1954)', Western Mail (Perth, WA : 1885-1954), various dates.
  • [S463] Various authors, 'The Inquirer & Commercial News, Perth', The Inquirer & Commercial News, Perth, various dates.
  • [S878] Website Western Australian Genealogical Society Inc. (http://wags.org.au).
  • [S883] Various authors, 'Bury & Norwich Post', The Bury and Norwich Post Newspaper, various dates.
  • [S891] Copy birth certificate of Williamina Ellen de Castilla, born 7 April 1895, registered 9 May 1895 in the Registration District of unknown registration district (Department of Attorney General, Government of Western Australia, 868/95).
  • [S902] Various authors, 'Sunday Times, Western Australia', Sunday Times, Western Australia, various dates.
  • [S911] Government of UK, 'London Gazette', London Gazette, various dates.
  • [S972] State Law Publisher, Government Gazette, 11 August 1922, Perth Western Australia.
  • [S973] State Law Publisher, Government Gazette, 13 September 1921, Perth Western Australia.
  • [S978] The Parliament of the Commonwealth of Australia, digital, 17 November 1904, unknown location.
  • [S1013] E-mail from Richard Atkins (Richard Atkins) to Robert Atkins, dated 8 September 2016 (Robert Atkins Personal Archives).
  • [S1016] 'Southern Advertiser (Bunbury)', Southern Advertiser.
  • [S1025] Unknown will type of Henry C de Castilla of Perth, Western Australia, 16/9/1932, proved in the Supreme Court of WA, 29/7/1938, State Records Office.
  • [S1033] Unknown author, 'Onslow News', Northern Times (Carnarvon) Onslow News, 1905 - 1952.
  • [S1035] Weekly Gazette Goomalling, 'Weekly Gazette Goomalling', The Weekly Gazette Goomalling WA, 1924 - 1946.
  • [S1079] Webpage TROVE (https://trove.nla.gov.au).
  • [S1081] Sewell, Barbara: The House of Northbourne Parkers Pioneers of Western Australia 1830 - 1983, Singapore National Printers (Pte) Ltd., ISBN 0 9592493 1 1.
  • [S1082] Australian Imperial Force - Nominal Roll (1914-18).
  • [S1083] Letter from Henry C Castilla, Colgonine, Baker's Hill, Western Australia, to Henry Moseley, dated 1 January 1936 , Robert Atkins Personal Archives.
  • [S1120] E-copy, Landgate, Midland, Western Australia, 4/11/2021.
  • [S1124] Website BillionGraves (https://billiongraves.com/).
  • [S1125] Copy marriage certificate of Paul Edward Castilla and Winifred May Evans, married 3 June 1891 in the Registration District of Sydney, Australia ,Robert Atkins Personal Archives, unknown gro index ref.