THe links in your first two posts produced nothing for me.
As a cotton broker, I imagine there was much money to be made in Alabama in those days. I'm mystified by how Sarah ended up iin the post office too, unless Julius' will left his assets elsewhere or she was doing it to pass the time. Maybe the civil war had an effect?
If interested, you will find details of Julius' parents at http://www.ghgraham.org/wilhelmbuttner.htmlhttp://www.ghgraham.org/wilhelmbuttner.html - this is an amazing free site operated by a man called George Graham in Tulsa. I have given him much information for it. At present their only child shown is Ida - my lineal ancestor. Hopefully Julius and his 2 brothers will be added soon. I have sent the details to George but it will be up to him what more to include.