At five o'clock, on the afternoon of the sixth, we passed the Platteen rock, a perpendicular precipice, not unlike the Cornice rock, near the mouth of a creek of the same name. Along the base of this cliff, we found the water three and sometimes four fathoms deep. In the evening we arrived at Herculaneum, a small village on the west side of the Mississippi, depending principally upon the lead mines for its business.[071] Here are three shot manufactories, all of them built at the summits of perpendicular precipices; by which means, the expense of erecting high towers has been avoided. Thirty or forty miles to the south-west of Herculaneum, commences the region of the lead mines, which, though not yet satisfactorily explored, is known to extend for many miles through the hilly country, at the sources of the Merameg, the St. Francis, and the other small rivers, rising in the angle between the Mississippi and Missouri, below the mouth of the latter river. Soon after the cession of Louisiana to the United States, particular care was taken to have all claims to land investigated and registered. Some few {50} may have been omitted, which may be hereafter revived, but these cannot be numerous. In all the recent sales of public lands in the western states and territories, liberal reservations have been made for the encouragement of learning. We subjoin some particulars, extracted from a communication of the commissioner of public lands. From this statement, it will be easy to form an idea of the liberal provision made by government, for the future support of schools and colleges. It is probable, similar grants will be made to the Eastern States.[072]