Odin,
Thanks for the info and scan of his attestation details. Would you happen to know whether Mitcham falls into the W Div area?
I've had a look through the various census and pieced together the following regarding James Keylock;
1857: Born Cirencester, Gloucestershire. 1871 Census: Errand Boy. Address; Preston St, Preston, Gloucestershire
1881 Census: Single. Address; Causeway Police Station, Mitcham,Surrey.
1881 (Jul-Sep): Married in Croydon to AdaLucy Kennett (Born 1859).
1891 Census: Occupation is Gatekeeper. Address; 29 Gaskell St, Clapham.
1900: Died in Wandsworth (age 42).
Children: James (1888), Leonard (1890),William (1898), Charlotte (1883), Eva (1886).
Unfortunately looks as if PC Thomas Keylock isn't his son but maybe some other relation.
Thanks again for your help.
Regards,
Rod