This is what I found in the 1870 census John Mills and Elizabeth Mills of Loretto, Marion Kentucky.
John Mills age 25 and Elizabeth 27 yrs born 1843, chidren Kate 6 yrs old and Marcus 1 yrs old I haven't been able to find anymore info on them. If Elizabeth died it must have been latter after that. Marcus is my g- grandfather through his son James Bernard Mills, I hope I haven't confused things but this is what I found. I posted this census to my tree under Elizabeth Miles.