Thank you to all who welcomed me to this site and responded.
I research British Home Children in Canada regardless of the sending/receiving organization.
I have been working for 25 years on these girls. In 1997, I got the three files from Barnardos After Care. I am aware of their lives in Canada until 1920 when Florence returned to England and Caroline was past the age of reporting to Mrs. Birt organization.
I was hoping the GRO database would assist in narrowing down my search, but I can not find registrations for the three sisters with the same surname for the mother.
Possible birth dates from their files are Florence 10 May 1899, Caroline 12 March 1900, Annie 4 April 1904. There was a note on Annie's file that there was no CoE baptism for her.
I have found the entry of Florence and Caroline into the Board of Guardians Kensington school in September 1904, leading to suspicion that their mother might have died. For some period before May 1909 all three girls were in the same place as Annie, my grandmother, described her sisters and always knew their names.
Any assistance on their life before Canada would be great. Also I am trying to find Caroline's married name and did she have a family.