The traveler who takes the seven-hundred-mile journey westward through the Camp, luxuriously housed in the coaches of the Great Western Railroad, comes upon a different scene and a different life when he reaches the ancient city of Mendoza in the foothills of the Andes. Here it was that San Martín recruited and organized his Army of Liberation, the army with which, emerging suddenly from its isolated hiding place, he startled the world by his crossing of the Andes to fall upon the unsuspecting Spanish. Mendoza is now the center of the wine and fruit industry. It is a thriving, well-supplied little city, with a population of between thirty and forty thousand, comfortable hotels, a theater, and a broad boulevard of its own, overhung with trees and named for the great revolutionary leader, where they have their band concerts and afternoon carriage parade just as they do in Buenos Aires. Only here, in their rather more dusky complexions, lots of the raven-haired, black-eyed occupants of the carriages show traces of Indian descent. The development of the wine trade is in keeping with the phenomenal progress of the rest of the country. Although the great bulk of the product is not of the highest quality, the presses turn out each year enormous quantities that bear the labels of Bordeaux, Burgundy, Moselle, and Muscatel, produced from the very best imported vines. Other fruits have been found to grow equally well in this section: peaches, pears, and plums reach a high state of culture, while apples, quinces, and cherries do very well. It is the boast of the Argentino that his country is capable of producing every conceivable kind of fruit, and it is not an idle boast. At this point—Mendoza—a change of car is made to the less comfortable narrow-gauge road that takes the traveler through the fastnesses of the Andes. The route leads first through the peach orchards and vineyards, with the snow peaks easily distinguishable in the background. The Mendoza River, fed by the melting snows on the mountain tops, tumbles along its way and is crossed and re-crossed many times en route. Distant about one hundred miles, one comes to the Puente del Inca, the famous natural bridge spanning a chasm one hundred and fifty feet in width, about which are many native legends of Incarial times, for the bridge formed part of the great system of roads built by the Incas. A little farther on, mounting to a still higher altitude, the station of Las Cuevas is reached, the last stop in Argentine territory, and the entrance to the tunnel through the mountain, half a mile below the Uspallata Pass—an engineering feat deserving of a chapter by itself. The elevation here is in excess of ten thousand feet, and the scene one of impressive grandeur, fascinating in the kaleidoscope of color that floods the gorges and the giant peaks. [Illustration: THE USPALLATA PASS.]