The change is noticed as the road approaches Mendoza, where the pampa gradually gives way to a country strongly resembling parts of Southern Spain; a land of poplars, willows, and acacias shading endless lines of irrigation channels; for rain falls but seldom on this eastern side of the Sierra, and on all hands, climbing the lower laps of the hills and lining the valleys, are miles of vineyards, which provide a stout red wine for the rest of the Republic. Further west still the land becomes more broken and barren as the hills rise higher and higher, until the ruddy sides, white glaciers, and snow-crested mountains of the Sierra appear, the giant Aconcagua monarch of them all. Further south than this the wonderful series of lakes that are almost inland seas high up in the Andes exist, as yet only partially explored to decide the frontier dispute between the Argentine and Chile, the remote valleys and austere uplands where the giant sloth is still believed by many to linger, a sole survival of the world before the great flood that destroyed life upon the nascent continent unrecorded ages ago. [Illustration: ACONCAGUA.] This marvellous country of Argentina is destined to be one of the great nations of the world. Nature is just, and in giving it a prodigious extent of flat fertile soil has more than compensated it for withholding the gift of abundant gold that has made the history of other portions of South America. With a climate that varies, as does that of Chile, from the tropical to the antarctic, with pasture and arable land unsurpassed in the world, and with facilities for transport by land and water enabling the fruits of the soil to be conveyed easily from remote districts to eager markets for them, no bounds can be set to the wealth that awaits enterprise in the country. As a highway, too, the possibilities of Argentina are immense. The connection of Buenos Aires by rail with Santiago and Valparaiso opens up a new and shorter route to New Zealand and Australia; whilst the rapidly progressing extension of the railway into Bolivia--another link, it is intended, of the line to run eventually from New York to Buenos Aires--will provide a new and welcome outlet for the treasures of her mines to Bolivia, a vast country without a port of its own.