{154} About two miles to the north-east of this spring, a little to the left of the road leading to the settlement of Derdonai, is the principal quarry from which the Washita oilstones are procured. It is near the summit of a high and steep hill of the petrosiliceous rock already mentioned. The oilstones are found in the perpendicular seams or fissures of the rock, from which they are detached with little difficulty, having, as they are dug from the quarry, nearly the requisite shape and size. They are then carried by hand, or thrown to the foot of the precipice, whence there is an easy transportation of ten or twelve miles to the Washita. By this river they descend to New Orleans, and some have been carried thence to New York, where they are known as the Missouri oilstones. These stones are said not to be inferior in quality to the oilstones from Turkey. In the immediate neighbourhood of the hot springs we observed a number of interesting plants. The American holly (ilex opaca) is a conspicuous and beautiful tree in the narrow vallies within the mountains. The leaves of another species of ilex (I. cassine), the celebrated cassine naupon frequent about the springs, are there used as a substitute for tea. The angelica tree (aralia spinosa, Ph.) is common along the banks of the creek, rising to the height of twelve to fifteen feet, and bending beneath its heavy clusters of purple fruit. The pteris atropurpurea, asplenium melanoraulon, A. ebeneum, and other filices are found adhering to the rocks. In the open pine woods the germandia pectinata, considered as a variety of G. pedicularia, is one of the most conspicuous objects.