Malaspina. Surveys the Shores of the Rio de la Plata in 1789. Bauza maps the Road to Mendoza: De Souillac that to Cordova. Azara, and other Officers, in 1796, fix the positions of all the Forts and Towns in the Province of Buenos Ayres. Don Luis de la Cruz crosses the Pampas, from the frontiers of Conception in Chile to Buenos Ayres, in 1806. Attempt at a mew delineation of the Rivers of the Pampas from his Journal. His account of the Volcanic appearances along the Eastern Andes. Sulphur, Coal, and Salt found there, also Fossil Marine Remains. The Indians of Araucanian origin: Habits and Customs of the Pehuenches Page 96 CHAPTER IX. PROGRESS OF INLAND DISCOVERY. Ignorance of the Buenos Ayreans respecting the lands south of the Salado previously to their Independence. Colonel Garcia's expedition to the Salt Lakes in 1810. The Government of Buenos Ayres endeavours to bring about an arrangement with the Indians for a new boundary. Their warlike demonstrations render futile this attempt. March of an army to the Tandil, and erection of a Fort there. Some account of that part of the country. The coast as far as Bahia Blanca examined, and extension of the frontier-line as far as that point. The hostility of the Indians makes it necessary to carry the war into the heart of their Territories. General Rosas rescues from them 1500 Christian captives. Detachments of his army occupy the Choleechel, and follow the courses of the River Negro and of the Colorado till in sight of the Cordillera Page 117 CHAPTER X. GEOLOGY OF THE PAMPAS. Geological Features of the Southern compared with those of the Northern Shore of the Plata. The Pampa Formation, probably derived from the Alluvial Process now going on, as exhibited in the Beds of the Plata itself and other Rivers. Fossil remains of land Animals found in it, above Marine Shells. Such Shells where met with, and of what Species. Mr. Bland's Theory of the Upheaval of the Pampas from the Sea, founded on the Deposits of Salt in them:--The presence of such Salt may be otherwise accounted for. Account of the Discovery of the Gigantic Fossil remains sent to England by the Author.-- Page 163 Additional Note on the Glyptodon, another fossil monster recently discovered in the Pampa formation Page 178_b_ CHAPTER XI. OF THE RIVERS PARAGUAY, PARANA, AND URUGUAY.