Evidently large numbers of horses, cattle and sheep afterwards strayed in a semi-wild condition down south from Peru and Brazil, attracted by the wealth of pasturage. The early history of the export trade of the River Plate colonists in hides, tallow, wool and jerked beef, is one of smuggling and bribery of officials. Nevertheless, even under such difficult circumstances and costly methods many settlers contrived, by also trading in European merchandise, to amass great wealth, the fortunes of many of them, says Mr. Gibson, amounting to over £60,000 sterling. Meanwhile the increase of cattle was astounding if one did not consider the difficulties in the way of its utilization. In the middle of the seventeenth century anyone could take all he wanted from the wild herds up to 10,000 or 12,000 head, or more by obtaining licence to do so from the Governor. The rights of free export of animal produce from Buenos Aires to Spain and open trade with the interior were first granted to the River Plate Colonies in 1778, under the Vice-Regal rule. But it was the Independence of the Colonies in 1810 which freed them from all commercial trammels and was the real commencement of their present agricultural and pastoral prosperity. Since then no events (except, of course, the advent of the railway in 1857) in the annals of the export commerce of the River Plate have been of greater importance than the founding of the Argentine Rural Society in 1866, and the discovery by Tellier of the preservation of meat at freezing point submitted to the Paris Academy of Science in 1872, and of Ferdinand Carré’s improvements for the transport of _chilled_ meat. The first freezing establishment in the River Plate was that erected by Señor Eugenio Terrasson at San Nicolás, in the Province of Buenos Aires, in 1883, and in the following year the legislature exempted frozen and chilled meat from the payment of export duty. Over 99% of the whole exports of frozen and chilled meat from Argentina comes direct to the United Kingdom,[42] and we get quite one-half of the whole of our overseas meat and grain supplies from the two River Plate Republics. The past half-century has seen amazing changes on the vast pasture lands of Argentina and Uruguay. The first of these was the invasion of what had formerly been the exclusive domains of cattle and sheep by agriculture. Little by little, wheat, especially, ousted the flocks and herds from an ever-increasing radius from the port of Buenos Aires. Land values increased as agriculture flourished till the time came when stock-breeders found themselves outbidden by wheat-growers or, rather, landowners found it more profitable to grow wheat or maize on lands which were economically accessible to transport. As the railways grew so did this almost exclusively cereal area. This tendency continued until what may almost be termed the “discovery” in the River Plate Territories of the qualities of Alfalfa (Lucerne).