Hi KatLady,
Hmmm, I wouldn't rule anything out as yet - because there were sons - James William, William James and James. When was the earliest your Australia chappie was in Australia?
I've just found this curiosity....
BAPTISM: Greenwich St Alphage
On 10 Nov 1834 , was baptised Emily Ann, born
23rd JuneDaughter of James William & Frances Hannah
CLEMENTSAbode:
Marlboro StOccupation: Waterman
It seems Emily Ann was baptised twice - the second time in 1844 to 'legitimise' her, no doubt

Her parents, James William MARTIN and Frances Hannah CLEMENTS married after Banns, at St Paul Deptford on 11 May 1835, after Emily Ann was born.
James CLEMENTS, the Waterman being her Grandfather? (and perhaps her father's occupation too in 1834):
1841: 3 (Little?) Marlborough St, Greenwich
/
James MARTIN 25, Carpenter, - Y
Frances MARTIN 25, - Y
Emily MARTIN 7 - Y
James MARTIN 4 - Y
Sarah MARTIN 2 - Y
//
1841: 2 (Little?) Marlborough St, Greenwich
James CLEMENTS 55, Waterman - Y
//
Cheers
AMBLY
EDITED