Here's a news item from the October 20, 1863 issue of the New Orleans Bee regarding the tannery at Bay St. Louis, this may or may not have a bearing on your research.

This item is located in the first column under "Result of a Naval Expedition to Bay St. Louis."

http://nobee.jefferson.lib.la.us/Vol-057/10_1863/1863_10_0033.pdf

Mitchell Sanders