The "_Cemeteries_" are oval, and from six to ten feet high, filled with bones, lying east and west, and when incased in sarcophagi, the rows run in the same direction. In some instances Dr. Dickeson found the bones lying in heaps, promiscuously. These he believes to have been the _canaille_. The "_Tent or Structure mounds_" are small, and a short distance below their surface, fragments of brick and cement are found in great quantities; sometimes skeletons and pottery. Never more than six skeletons are found together, and more care is shown in the burial of these than in the "cemetery mounds." In one instance an angular tumulus was seen by the Doctor, with the corners quite perfect, formed of large bricks, bearing the impression of an extended hand.[2] Many mounds and tumuli are advantageously situated on the tops of ridges, surrounded with walls. Some of the latter have crumbled away, while others remain strong and perpendicular. In many instances, the walls that surround these groups of mounds, form perfect squares and circles. Dr. Dickeson adds that, "if from the centre of one of these groups a circle were traced, it would strike the centre of each mound, both large and small." They contain numerous fragments of walls, images, pottery, ornaments, etc. etc. The "Temples" are generally situated among the hills and ravines, with perpendicular escarpments, improved by artificial fortifications. The enclosures often embrace upwards of thirty acres. The great enclosure at "the Trinity" contains upwards of one hundred and fifty acres, and is partially faced with sundried brick. Upon the plantation of Mr. Chamberlain in Mississippi, the temple is flanked with several _bastions_, besides _squares_, _parallels_, _half moons_, and ravines with perpendicular escarpments for its defence. The ditches and small lakes are frequently chained for miles and filled with water, intended, the Doctor thinks, for outworks. In these, bricks are found both at the bottom and on the sides. Among the rubbish and vegetable deposits taken from them to put on the land, ornaments, and other relics are found.