You show when and where Sallie died, do you know when and where Lee died?A copy of his death certificate should show the names of his parents.
The 1880 census does not ask info about land owned, but 1870 Burnet Co, TX shows Addison didn't own land at that time, buthe has $2000 value for personal, maybe sizable heard of cattle???You might check land records in Llano Co, TX, see if Addison owned land there, if so, then see what happens to that land.When final sale is made all heirs will have to sign off to give clear title to buyer.See if there is anything that shows son Lee and maybe even where he was living, often those records will say "of" and name the county of residence.When you can't "prove" then try and "disprove."I love land records.
I see you have posted on the Conner forum, did you do a search?I love it when at least someone in a family has a less common name.I typed Addison in the Search this Forum box, several posts came up.Some are very old and those people may not still be around, I would respond to them anyway.And go through and glean info they have posted.One posted Dec 2003, maybe she'll be of some help.Looks like if you should tie to Addison, work has been done on that family.I'll keep my fingers crossed.