just the 2 of them in 1861
their name changed to gambell in 1871 census, still just the 2 of them
1881 see's David Gamble (note the spelling again) on his own with a Hanna gunn abt 1835 Chelmsford ,living with him ,shes listed as a house keeper, his occupation as labourer
I have Charlotte Gamble died aged 47 sept 1875 Chelmsford
Otherwise I couldn't locate her on any other census