...cavalry, made an ineffectual attempt to raise the latter vessel to add it to the Confederate navy. Grant's work on the canal was soon checkmated by Pemberton, who strengthened the fortifications at Warrenton . The expedition down the Coldwater and Tallahatchie, led by the powerful ironclad Chillicothe, was met by General Loring, who constructed Fort Pemberton with cotton bales, covered with earth, on ...