Near a small fort about 25 miles North of Constantinople, and on the beach of the Black Sea about five miles from the village of Doumousdere (or valley of Wild Boars), is a stratum of coal dipping to the South West. It runs along the shore—sometimes on a level with the water, and at other times appearing in the sandstone 20 or 30 feet above the Sea for an unknown distance. I followed it for several miles along the coast; and the stratum, as is seen on the side of the sandstone rock, is in many parts 6 feet thick—though rock and hills, which lie upon and over this coal, are composed of slate clay passing into sandstone. The strata of sandstone are frequently divided by large veins of a compact argillaceous nature containing Mica and running in the same direction. The coal at the surface is quite woody; but at the depth of two or three feet it loses this appearance and assumes that of Pitch. It does not soil the fingers, and is very light. Two Chalybeate springs arise from this stratum of coal, and deposit much ferruginous sediment. I could find no remains of animals or shells in it, or in the sandstone. The surface of this country is covered by the Forest of Belgrade, which appears to have degenerated for many ages, and is too intricate for a mineralogical survey.