Wyeth conceived the idea of a great trading company on the Columbia, whose operations would necessarily create rivalry with the British. His design was to send companies across the continent to the Columbia head-waters and to maintain also ship connection by way of Cape Horn. He believed that a ship load of salmon from the Columbia River to the Atlantic sea-board would be a paying venture. On so large a scale did he lay out his enterprise that he expected soon to have a business of two hundred thousand dollars a year. But he looked beyond the fur and salmon business to American possession and settlement, at least south of the River to the California line. He therefore embraced in his view the building of enterprises which should lead up to and then profit by American immigration. Wyeth spent five years in Oregon, having many interesting adventures, and as many business reverses. As was the case with Astor, the British fur-traders proved too powerful for the Yankee. Among other undertakings, he built a fort on Sauvie's Island at the mouth of the Willamette, which he called Fort William. He desired to make this the basis of his trade, and he expected the Indians to go there to trade. But such was the influence of the Hudson's Bay people and their employees with the Indians that Wyeth's fort had no trade. It was during those years that a frightful pestilence swept the natives away like flies, and there was great fear among them that Wyeth's fort might harbour the scourge. The period of Wyeth's enterprise in Oregon extended from the spring of 1832 to the autumn of 1836. Though not a business success, it had a great bearing on the creation of an interest in Oregon, and on preparing for immigration a few years later. It opened the eyes of many Americans to the attractions of Oregon and to the tremendous power and profits of the Hudson's Bay Company. The next movement may be called a real immigration to Oregon. It consisted of a party of nineteen, commonly known as the "Peoria party," since they went from Peoria, Ill. Jason Lee, the missionary of Chemeketa, delivered a lecture at that place in 1838, and so much interest in Oregon was aroused that in the year following, the Peoria party, the first regular party from the Mississippi Valley, set forth for the River of the West. Their leader, T. J. Farnham, christened his followers the "Oregon Dragoons" and Mrs. Farnham gave them a flag with the inscription, "Oregon or the Grave." Farnham declared his purpose to seize Oregon for the United States.