Bertha Cecil Collier (1858–1943)
Daughter of William Frederick and Cycill Christiana Collier.
BMD (Birth index)
Burke’s family records (Ancestry.com, accessed 5 November 2012)
England & Wales, national probate calendar (index of wills and administrations), 1858–1966, 1973–95 (Ancestry.com, accessed 20 November 2017)