PS. Just seen that there are 2 Georges in Manea (N. Witchford RD) in 1901.... the 1865* chap is married to a Hannah - tis an 1867 chap married to Sarah ... who says she is born Manea, which would thus be strange to marry in Wisbech District.
May just be the oft-used Census PoB shortcut of course.
There is a Sarah Garner in 1891 Wisbech born 1877, whose Dad is a Mole Catcher

Is your man George Marshall shown as a Stoat Catcher in earlier years, as he was in 1901 ?
*As you were ! George and Hannah were already married in 1891, unlike your chap