The chiefs, after their departure, sent to our encampment a present of fresh sturgeon, a species which is caught abundantly in the aux Sables at this time, for which returns were made of such articles as were most acceptable to them. Being out of the Bay, we employed the following day making advances along the Huron coast, an estimated distance of forty-eight miles. In this distance, we passed Thunder Bay. Encamped on a low, calcareous shore, bearing cedar and spruce, which the Indians call Sho-she-ko-naw-be-ko-king, or Flat Rock Point. A few miles after leaving River aux Sables, the Highlands of Sables present themselves at a short distance back from the shore. This ridge, which is a landmark for mariners, runs from southeast to northwest, and is visible as far as Thunder Bay. The limestone, which is dark and of an earthy fracture, is very much broken up on the shore, and contains various species of organic remains. On crossing the Bay, we landed on an island covered with debris, where we observed one of those imitative, water-worn, primitive boulders, resembling altars, which are frequently set up by the Indians as the places of depositing some offering, or out of mere respect for some local god. At six o'clock the next morning we were again in our canoes, assiduously moving along the Huron coast; but, after proceeding about a league, a storm of wind and rain suddenly arose, driving us from the lake. A few hours served to restore its calmness, but we had not gone over a couple of leagues when we were again compelled by the rising wind to take to the shore, where we were detained the rest of the day, listening to the capricious murmurs of the lake. This position was directly opposite Middle Island, a noted anchorage about six miles distant. All night the waves of the lake were heard. The morning broke without change. Lake Huron still evinced an angry aspect, threatening to renew the struggle of yesterday. It was concluded to send the canoes forward, relieved of our weight, and proceed ourselves on foot along the beach. Walking on this became difficult on those parts of it where the fossiliferous and shelly limestone had been broken up and heaped in small fragments. Among these, we recognized specimens of the cornu-ammonis, and the maderpore, with some other species. The cedars and brushy growth generally stood so thick, and grew so closely to this line of debris, that it was impracticable to take the woods. The toil, however, rewarded us with some specimens of the organic forms imbedded in the rock, while it enabled the topographers to secure the data for a very perfect map of the coast. At ten o'clock in the morning we reached the east cape of Presque Isle Bay, where the canoes came to take us across to the peninsula of that name. After completing this, the men landed the canoes and baggage on the peninsula side, and carried them across the narrow sandy neck of land; but, on reaching the open lake beyond it, the wind