i. "Census Returns of England and Wales, 1911." online database.; Page (accessed 2 Sep 2018), entry for Eliza Blacknell household, Nottingham; [Source Record]; Certainty Secondary Evidence
ii. General Register Office, Southport; Page entry for Alfred Blacknell, volume 7b, page 399, Q3 quarter 1905, Nottingham district;; [Source Record]; Certainty Primary Evidence
iii. "England & Wales, Death Index: 1916-2005," database online; Page accessed 20 Jan 2020), entry for Alfred Leslie Blacknell.; [Source Record]; Certainty Primary Evidence