I presume you meant to type 1820, not 1920, for the birth of G W CASSLE.I have a man by that name in my files born c.1820 TN, md 1846 AR to Elizabeth MAXWELL. She was last found in the 1860 Census of AR, and George in the 1870 US Census of Texas.
I will shortly begin incorporating the last-and-final updates to my MAXWELL database toward a possible hard-copy release in 2004, at which time such releases will cease, as I divert my attention elsewhere. My database begins with a couple believed by some to have been Elizabeth's great-great-grandparents.
Should you or any of your contacts have information (notably names and dates) on descendants of George and Elizabeth which you would be willing to share, please do so, for the benefit of others interested in the extended MAXWELL family.