Geometry is there a _rara avis_; and were any one capable of measuring the land, and desirous of the attempt, he would want the courage to enter it, deterred either by the fear of savages, or by the difficulties of the journey. Men of our order, seeking out savages for God and the Catholic King, examined the coverts of its forests, the summits of its mountains, and the banks of its remotest rivers, traversing, to the utmost of their ability, every part of the province, always risking, and often losing, their lives. In Peru and Mexico, there is no corner which the Europeans, attracted by the hope of gold, have not searched into; but we are still unacquainted with great part of Paraguay, a region unproductive of gold, and, therefore, wanting the requisite allurement. As for what is discovered, who can deny that it is almost entirely owing to the efforts of the Missionaries? The plains which they traversed, the rivers which they crossed, together with the distances of places, they have noted with the utmost fidelity, though not always with equal art. Paraguay is subject to the King of Spain, in whose authority it is ruled by three governours, and as many bishops. Each province has its governour; the first is that of La Plata, on the banks of which is the city of Buenos-Ayres, the seat of the royal governour, and of a bishop. It is famous for an academy, monasteries for both sexes, a port, and a citadel, which, though impregnable to the assaults of savages, and even of the citizens themselves, would soon yield to the warlike engines of Europeans; the river compensates for the weakness of the walls, ships being prevented, by shoals, from approaching. It is destitute of a wall, ditch, gates, and similar fortifications; defects common to all the other cities of the province. The inhabitants are reckoned at 40,000, the dwellings at about 3000, constructed chiefly of brick, and roofed with tiles; but they are all low, excepting a few of two stories. The churches are handsome, even to the eye of an European. The finest are two of which Primoli, a Roman lay-brother of our order, and now in repute in his native city, was the architect. There are no public fountains, colossal statues, or images of the Saints in the market-place. You may count more carriages in Austrian Vienna in one street, and in one hour, than you can here, in the whole city, during a whole year. Troops of horse may be seen every moment, nor is it surprising, that even those of moderate estate should, in the Spanish tongue, be called _Cavalleros_. Military rank, the magistracy of the city, and similar dignities, alone confer nobility. The riches of the inhabitants consist rather in cattle, than in money. The land round about the city, for near two hundred leagues, is a well wooded plain, often destitute of water, but rich in corn and pasturage, the latter of which feeds innumerable herds of cattle, horses, and mules. Wherever you