I am also the paternal 2nd Cousin 4 times removed of Pvt. Isaac Theadore Causey, Company E, 22nd Mississippi Infantry. My research shows he also died on August 5, 1862 at the Battle of Baton Rouge and I believe is buried Memorial Gardens Cemetery, Baton Rouge, La. I have never been to the gravesite though.
Please keep us posted on any events taking place there as I would be happy to attend. I live a couple hours away in Evangeline Parish.