I know that sarah jane Douglas was still living at home on the 1871 census with her parents howard & mary ann Douglas. Then on thye 1881 census she is still in ST.james but now with her husband james Sherman. So somtime between 1871 and 1881 sarah jane Douglas married james Sherman.
on the 1871 census her surname Douglas is spelled Dougles.
On the 1881 census it has james Sherman and sarah jane Sherman (Douglas) with 3 of their children walter abt age 7 howard abt age 5 mary ann abt age 2