hi Glen,
I havnt come across her on the 1891 census looking under Jane as there is a birth registered in 1872 for a Jane Cooper.
Found this marriage in 1895.
District South Stoneham
Oct/Nov/Dec 1/4
Jane Cooper
Arthur Chalk
Here she is in 1901
Civil parish St Mary Extra
Rd South Stoneham
Sub RD St Mary Extra
Town Itchen
Address Back Rd, Itchen
Jane chalk head age 28 (born abt 1873) married born Itchen
Arthur son age 4 born Itchen
Daisy dau age 1 born Itchen
What do you think?