It was not the policy of Spain to take the trouble of accurately examining her colonial possessions, except when obliged to do so in furtherance of measures of self-defence, or in the expectation of some profitable return in the precious metals, the primary objects of her solicitude: and, but that the high road from Potosi to Buenos Ayres ran through them, I believe in Europe we should hardly have known, till recently, even the names of the capital towns of the intermediate provinces: it is only since their independence that they have brought themselves into notice, and that any information has been acquired of the nature and importance of their native products. When I arrived at Buenos Ayres in 1824, in hopes of obtaining the best existing accounts of their statistics, I addressed myself to the governors themselves; and I have every reason to believe, under the circumstances, that they were desirous to meet my wishes. I received from them all the most civil assurances to that effect; but, excepting from the Entre Rios, Cordova, La Rioja, and Salta, I found the authorities themselves utterly unable to communicate anything of a definite or satisfactory nature; and, although they promised to set to work to collect what I asked for, I soon found they had most of them other matters on hand which had more urgent calls on their attention. Of the information which I did so obtain, the most complete by far was from General Arenales, the Governor of Salta, who not only forwarded to me an interesting report upon the extent and various productions of that province, but, what I less expected, a very fair map of it, drawn by his own son Colonel Arenales; an individual who has since distinguished himself amongst his countrymen by the publication of a work[3] wherein he has with great pains collected all the information he could obtain to elucidate the geography and capabilities of a province which nature seems to have destined to be one of the most important of the Argentine Republic. Were his good example followed by equally intelligent individuals in other parts of the interior, the natives, as well as foreigners, would be greatly assisted in learning not only what are the productions of their own country, but in what manner they might be rendered available in furtherance of its prosperity. He has done his duty, and rendered a service to his country, by pointing out the great importance of the possibility, now proved beyond a doubt, of navigating the river Vermejo throughout its whole course, from Oran in the heart of the continent to its junction with the Paranã, and thence to the ocean.