Hi,
I have looked up the 1861 census for you, and this is what is on it:-
George Martin 41yrs Labourer Born in St Georges Martyr, Middx
Rebecca " 40 yrs Born in Hertford
Children
William K G " 14yrs Messenger Born in St Andrews Hol. Middx
F.A.M. " 9yrs Born in Islington, Middx
John R J " 3yrs Born in Hoxton Middx

Their address at that time was :-
2, King Henry S Walk, Islington East, Middx

I hope this will be of some help, I know what it feels like when you hit a brick wall.