Great to hear from you - and I am sure Wendy will be thrilled to bits to read your message!
I had hoped a descendant might read those posts...
having read Harold's War record it is obvious he was fostered or probably adopted ( which is what I thought when looking into all this originally)....working on the new info that his name was Harold Wilfred Alan BOURKE, I went looking and found this:
Name: Harold Wilfred Allan
Father's Name: Allan
Mother's Name: Louisa Allan
Birth Place: Carlton, Victoria
Registration Year: 1896
Registration Place: Victoria
Registration number: 18241
On the Vic CD's it says father unknown...the above record is from Ancestry...curiously though, there is another boy b 1905 with the exact same name b Seymour Vic to a Louisa ELLIS and William ALLAN.
I have not found any other records for boys ( eg marriage or deaths) with this name...my thoughts are that when Lydia adopted Harold, she just added BURKE...and kept his original name. Also thought it interesting that Harold kept chopping off the second 'L' in Allan and then went by the name Alan!
I haven't found a marriage for Wm ALLAN and a Louisa ( its not the DAVENPORT family)..there are about 3 marriages for Louisa ELLIS - and some for Louisa ALLAN...a bit more work needs to be done on this mystery, but it could be worth getting that 1896 birth cert and see what it says
I will do a bit more on this tomorrow