I driven by Farrs so many times on the M50 motorway ( without knowing !)
near Castletump north of Newent
a mile south of Dymock

http://www.old-maps.co.uk/
co ords 370408,229270

Location is at 370495E 229245N (N51:57:39 W2:25:51)
http://www.streetmap.co.uk/streetmap.dll?G2M?X=370495&Y=229245&A=Y&Z=3

Farrs Four Oaks Newent GL18 1LU

There seems to be a missing part to Ancestry's 1881

RG11/2528 /1 seems to start at Page 9 which is Four Oaks
I'm sure that Farrs would be enumerated on Page 7 or page 8 (!)