In Mississippi, Brown Cozzens apparently was the owner of a large sawmill complex in Natchez. There are records of insurance policies he held on the lives of six slaves who were employed at the mill, and a historic excavation of the site carried out in 1999 show the mill to have been in operation between 1841 and 1870. Brown Cozens died in 1875 at Natchez, Eliza died of Yellow Fever, in 1853. They are both buried in the City Cemetery in Natchez.