Hi there,
The 1841 records are not complete, for example they do not include many of those who were living/working in the densely populated areas around Sydney Harbour. The format for that census is unlike the UK census. And, later census records were not kept with the exception of householder returns around the end of the 19thC in some districts of NSW.
So it is unlikely you will find place and date of birth for your chap via NSW census records BUT ....
There was a George Lewis Poignand with an office in King Street, Sydney, in the Burke Ward in 1842/3. And the Assessment books for the Town of Sydney have survived since its incorporation... And teams of volunteers have transcribed many of those. These are a treasure trove, as they will give you the tennant, the landlord, the full address, the building's construction/no of floors, its value for the purpose of assessing the Council's rates
And then there's the maps from that early time too.
And those and lots of other resources are linked at this link
http://www.rootschat.com/forum/index.php/topic,369703.0.htmlNSW BDM, and transcript agents, and what to expect from the records
City of Sydney assessment books, maps
NSW State Records Office (including applications for grants / purchases of land)
Trove newspapers and its earlier version, Ferguson newspapers (harder to search as not keyword OCR operational)
and so very many more.
Do you have the 1855 d.c. ..... it predates civil registration so it is just a burial certificate, but it could help to show which cemetery and then if there is a headstone or at least a transcript of any headstone...
Cheers, JM