Veronika (kitten  @t  betalink.net.au) of Melbourne, Australia, says I enjoy going forward and finding cousins, and going back into the past, and padding out their lives along the way. My George Liberty COOK, christened 21 Mar 1802 Great Gaddesden and Nettleden. [parents Thomas and Charlotta surname?] married Ellen ALLEN 29 Jan 1826, St Leonards, Shoreditch, London. My Frederick COOK was christened 19 Dec 1832, Hemel Hempstead.

His brothers, Charles chr 10 Feb 1831, Hemel H.
George Liberty COOK, chr 21 Jun 1838, Hemel H.
William, chr 19 May 1842, Hemel H.
Henry was christened at Cathedral Manchester, Lancs. 1 Jan 1832.

George Liberty COOK Senior was a Baker according to Pigots.

I have a possible marriage for Thomas and Charlotte LIBERTY, 26 Sep 1802, Great Gaddesden and Nettleden, but this was 6 months after George Liberty COOK's christening date <smile>

Are you able to add anything to this, back, their lives, or forward, Chris?

You don't say the sources of your information and I would guess you have used the IGI (perhaps via familysearch) without checking with microfilms of the original parish registers at your local LDS Family History Centre or other Melbourne Genealogical Library. The idea that a baker in Hemel Hempstead should have a child baptised in Manchester is so unlikely as to need very solid evidence to back it - and the dates don't fit in with the biology of birth either. Delete Henry from your list of children. You should have a look at the page Right Name, Wrong Body and the Limits of familysearch

The marriage between George Cook and Ellen Allen may also not be relevant - what does the register say about their parishes of abode? There is also an unnaturally long gap between the marriage and the first born which may need explaining if it is the right couple. There may be something about the baptism of George Liberty Cook in Great Gaddesden in 1802 which is not in the index - so look at the microfilm of the register to see what it says ...

Pigot's  Directory 1823/4 - No George Cook listed under Baker
Pigot's  Directory 1839 - George Cook, Piccott's End, Hemel Hempstead - Baker & Flour Dealer
Post Office Directory 1850: George Cook, baker, Piccott's End
Post Office Directory 1870: George Cook, baker, Piccott's End
Post Office Directory 1878: No George Cook listed

I can also fill in details of one of the brothers from the 1881 census CD. The following family was living in Church Lane, Dagenham, Essex:

A quick check in the 1870 Post Office Directory shows that Charles Cook was a baker in Akeman Street, Tring.

You would be well advised to have a look at the 1851 census microfilm for Hemel Hempstead (Piccott's End) to look at George and any of his family still living at home - and in particular the age and birthplace of his wife. You could also purchase George Liberty Cook junior's birth certificate from HALS, which will give you the maiden name of his mother.