Hi again
I had a look at the convict records for your George & Joseph & as they are stated to be brothers I would say it is looking very promising that they are the 2 boys born to Joseph & Sarah. I can't see another George or Joseph born to any one else in 1815 or 1817 in St Albans.
I expect you have the details for the marriage of Joseph to Sarah Wright on the 10th Oct 1802 at St Peters. I believe her burial was April 3rd 1854 at St Peters, she was aged 76.
I also found the image of George's marriage to Mary Swan in Avoca on Family Search, what a shame there is no father stated for the groom.
Same goes for the marriage of Joseph to Eliza Truebody in Launceston 20th Dec 1845.
If you are interested there is a report of the 2 boys conviction in the Hertford Mercury on the 12th Jan 1836 that states Joseph & George were indited for stealing ten shillings from Joseph Gurney. It also says that the prisoners behaved in a most insolent manner to the court & had both been gaoled several times before for trifling matters.
It must have been a struggle for labourers back then to survive & I guess 10 shillings was quite a substantial amount to steal to warrant a sentence of transportation. Good to know they both made new lives in Tassie.
Maddie