Think I might have found her death.
An Elizabeth CLAPHAM died 6 Mar 1891 in Hammersmith. Probate was granted to her nephew Charles Bridges STEVENS of Reading, Berkshire.
Charles Bridges STEVENS, born in Eton in 1848, is a son of Thomas Howell STEVENS and Mary COMINS, sister of Elizabeth.
Where was she in 1861, 1871 and 1881 census.
Ian C