I have replied to the specific request relating to George as follows:
"Cookham parish register for the period in question (1813-37) has been extracted onto the BVRI.
George Harding son of James and Sarah was baptised on 30 Dec 1832 at Cookham
George Harding son of William & Elizabeth was baptised on 12 Oct 1834 at Cookham"
As what's on the BVRI seems to differ from the previous post I'll list all the Harding baptisms in Cookham where the father is James, for the period 1813-37
Anne 30 Jan 1814 James & Elizabeth
Sarah 11 Feb 1816 James & Elizabeth
Elizabeth 19 Apr 1818 James & Elizabeth
Henry 10 Sept 1820 James & Elizabeth
Richard 1 June 1823 James & Elizabeth
Martha 15 May 1825 James & Elizabeth
Charles 25 Dec 1828 James & Sarah
Emma 31 Oct 1830 James & Sarah
George 30 Dec 1832 James & Sarah
John 14 Feb 1836 James & Sarah
Marriages on
http://www.familyhistoryonline.net/ in Berks, which is not complete but which includes Cookham and Clewer (8 miles apart - pretty close by English standards but regarded as next door in Australia) of James Harding are
8 May 1802 at Cookham by licence Elizabeth Wix both otp
18 Feb 1822 at Clewer by Licence Sarah Rixon both otp
Burial
Sarah Harding age 38 at Cookham on 4 Nov 1836
A couple of children, at least, of James and Sarah appear to be missing from the baptisms - Louisa and William
David in France