just found this
so unless your sarah greenop was married to richard wood and then to valentine brownlee all between 1872 and 1881
the one posted will not be yours
i will give you the census info and then see if i can find a death of richard wood and a marriage between a sarah wood and mr brownlee.
1881
RG11/5207/51/15.
valentine brownlee age 26. b. kirkby,lancs. occ. slate miner. head.
sarah age 31. b. langdale. wife.
mary age 4mnths. b. langdale. daughter.
robert greenop age 14. b. brathey?,lancashire. occ. slate miner. brother in law.
living at oak bank,langdale.
so going by this census sarahs parents were probably in lancashire in 1871 maybe that is why she was not with them in 1871. will see if i can find them in 1871.