In our progress from the sea coast, we rise gradually, by several steps or ascents, in the following manner: first, from the sea coast, fifty miles back, is a level plain, generally of a loose sandy soil, producing spacious high forests, of Pinus tæda, P. lutea, P. squarrosa, P. echinata, 1. Quercus sempervirens, 2. Quercus aquatica, 3. Q. phillos, 4. Q. tinctoria, 5. Q. dentata, 6. Q. prinos, 7. Q. alba, 8. Q. finuata, 9. Q. rubra[10], Liriodendron tulipifera, Liquidambar styraciflua, Morus rubra, Cercis tilia, Populus heterophylla, Platanus occidentalis, Laurus sassafras, Laurus Borbonia, Hopea tinctoria, Fraxinus excelsior, Nyssa, Ulmus, Juglans exaltata, Halesa, Stewartia. Nearly one third of this vast plain is what the inhabitants call swamps, which are the sources of numerous small rivers and their branches: these they call salt rivers, because the tides flow near to their sources, and generally carry a good depth and breadth of water for small craft, twenty or thirty miles upwards from the sea, when they branch and spread abroad like an open hand, interlocking with each other, and forming a chain of swamps across the Carolinas and Georgia, several hundred miles parallel with the sea coast. These swamps are fed and replenished constantly by an infinite number of rivulets and rills, which spring out of the first bank or ascent; their native trees and shrubs are, besides most of those already enumerated above, as follow: Acer rubrum, Nyssa aquatica, Chionanthus, Celtis, Fagus sylvatica, Sambricus; and the higher knolls afford beautiful clumps of Azalea nuda and Azalea viscosa, Corypha palma, Corypha pumila, and Magnolia grandiflora; besides, the whole surface of the ground between the trees and shrubs appears to be occupied with canes (Arundo gigantea) entangled with festoons of the floriferous Glycine frutescens, Bignonia sempervirens, Glycine apios, Smilax, various species, Bignonia crucigera, Bign. radicans, Lonicera sempervirens, and a multitude of other trees, shrubs, and plants less conspicuous; and, in very wet places, Cupressus disticha. The upper soil of these swamps is a perfectly black, soapy, rich earth, or stiff mud, two or three feet deep, on a foundation or stratum of calcareous fossil, which the inhabitants call white marle; and this is the heart or strength of these swamps; they never wear out or become poor, but, on the contrary, are more fertile by tillage; for when they turn up this white marle, the air and winter frosts causing it to fall like quicklime, it manures the surface: but it has one disadvantage, that is, in great droughts, when they cannot have water sufficient in their reservoirs to lay the surface of the ground under water, it binds, and becomes so tough as to burn and kill the crops, especially the old cleared lands; as, while it was fresh and new, the great quantity of rotten wood, roots, leaves, &c. kept the surface loose and open. Severe droughts seldom happen near the sea coast.