I haven't read other folks' replies, so don't know if the 1880 census, which I couldn't find, has been provided, but I finally found it.
1880 Chicago, Cook Co IL STOKES Joseph 50 Switzerland; watchman Elizabeth 30 Luxemburg William 12 Henry 9 Rosa 6 Katie 5 Joseph 3 Julia 1 all b Cook Co Urban d 2-25-1888; Rosa had ch b 12-10-88, but apparently didn't live to adulthood, as Rosa has no ch with her 1900. I believe she was also married to John WOLTER 1893; he d 1897 or 1899 [d/dates for 2 Johns].Looks like she reverted to STOCKER [1900 census; marriage to Wm STODDART]. She is living with dau Katherine CAMPBELL 1920 Chicago. It's interesting so many of her kids were married in WI.
1865 Chicago census U. STOCKER ae 30-40, single next dr Jos? STOCKER ae 30-40, single
Urban STOKER was naturalized 11-1-1884 Chicago.The file may have more info than what is on index card. Marriage may also be on file;online Cook Co. marriages begin 1871. You might even consider having her d/date inscribed on the tombstone IF this is where she was laid to rest.