Not sure if this means anything, on the Sheffield City Council website in births
Charles Frederick Salt has two entries: both for 1891
Reg: 67 Entry: 91 District: Attercliffe
Hi Lyn I have William and Ellen Salt in my Family Tree. Sarah Salt( mother of William)is my great grandmother. Do you have any information on William's father and Sarah's parents? Regards Ena
From the GRO it does look like Ellen is Ellen King the two children shown on the 1911 census Ellen and Charles both show up on the GRO as mothers maiden name King. Ellen King married William Salt in 1877.
On the 1871 census census Ellens parents are William and Sarah King, Sarah is possibly Ward