i. "England & Wales, Marriage Index: 1916-2005," database online; Page accessed 2 Jun 2020), entry for Helen Freer and Walter H. Cooper.; [Source Record]; Certainty Secondary Evidence
ii. National Probate Calendar (Index of Wills and Administrations).; Page 1932: page 775, entry for Helen Cooper; [Source Record]; Certainty Secondary Evidence
iii. Marchant, Anne. Interview by Paul Blacknell. personal knowledge, not recorded. .; [Source Record]; Certainty Primary Evidence