The coast has a singular configuration beyond the Morro de Tigua, the terminatory point of the group of little mountains which rise like islands from the plain. We found at first a marshy soil extending over a square of eight leagues between the Bocas de Matuna and Matunilla. These marshes are connected by the Cienega de la Cruz, with the Dique of Mahates and the Rio Magdalena. The island of Baru which, with the island of Tierra Bomba, forms the vast port of Carthagena, is, properly speaking, but a peninsula fourteen miles long, separated from the continent by the narrow channel of Pasacaballos. The archipelago of San Bernardo is situated opposite Cape Boqueron. Another archipelago, called Rosario, lies off the southern point of the peninsula of Baru. These rents in the coast are repeated at the 10 3/4 and 11 degrees of latitude. The peninsulas near the Ensenada of Galera de Zamba and near the port of Savanilla have the same aspect as the peninsula Baru. Similar causes have produced similar effects; and the geologist must not neglect those analogies, in the configuration of a coast which, from Punta Caribana in the mouth of the Atrato, beyond the cape of La Vela, along an extent of 120 leagues, has a general direction from south-west to north-east. The wind having dropped during the night we could only advance to the island of Arenas where we anchored. I found it was 78 degrees 2 minutes 10 seconds of longitude. The weather became stormy during the night. We again set sail on the morning of the 29th of March, hoping to be able to reach Boca Chica that day. The gale blew with extreme violence, and we were unable to proceed with our frail bark against the wind and the current, when, by a false manoeuvre in setting the sails (we had but four sailors), we were during some minutes in imminent danger. The captain, who was not a very bold mariner, declined to proceed further up the coast and we took refuge, sheltered from the wind, in a nook of the island of Baru south of Punta Gigantes. It was Palm Sunday and the Zambo, who had accompanied us to the Orinoco and did not leave us till we returned to France, reminded us that on the same Sunday in the preceding year, we had nearly been lost on the north of the mission of Uruana.