Ordnance survey map from the 1870's, can zoom in
https://maps.nls.uk/view/266664541In the middle, from top
Groombridge and the railway station, and there is Lealands, which I guess is in Rotherfield
Pan right to Broadwater Forest, which should be in the parish of Frant, and there is the sewage farm!
It may be easier to see all this on the 1890s OS map, here
https://maps.nls.uk/view/101433912So, taken with the newspaper reports, I think it looks promising for James Terry in Rotherfield in 1871 being the chap at the sewage farm in Frant in 1881 and 1891.