In the summer of 1833 Alexander Culbertson, next to McKenzie the greatest of the American Fur Company traders, went up with Mitchell from Fort Union, and began his long and eventful career on the upper river. Prince Maximilian was a guest of the party, and remained at Fort McKenzie nearly all summer. While there he was treated to a genuine Indian battle. The Assiniboines, becoming weary of peace, broke the treaty of two years before, and fell upon a band of Piegans who were encamped around the fort. They killed several Indians in the first onset, but were quickly repulsed by aid of the inmates of the post, and were finally driven back beyond the Marias. Mitchell and Culbertson took part in the fight, and the venerable Prince became its historian.

ALEXANDER CULBERTSON

BLACKFEET AND CROWS.

The history of Fort McKenzie had more of excitement and incident about it than any of the other early trading posts. The Blackfeet and the Crows were deadly enemies of each other, and many were the bloody encounters between them. The Crows often came to seek their enemy in his own country, and the Blackfeet went to the Crow country on the Yellowstone, where the inmates of Fort Cass witnessed the counterpart of scenes which fell under the eyes of the traders at Fort McKenzie. It is said, but upon uncertain authority, that the Crows once actually laid siege to Fort McKenzie, but as they were a friendly tribe to the whites, this may be taken with some allowance. It is certain, however, that for many years the warfare between these two tribes raged with great fury, though not with much loss to the traders, for the booty captured from one party found its way directly to the trading post in the country of the other.

SMALLPOX AMONG THE BLACKFEET.

The thrilling incidents with which the annals of Fort McKenzie abounded in these early years would fill a volume; but we can note only the more important. The year 1837 was the year of the terrible smallpox scourge among the tribes of the Missouri Valley. Great care was taken at Fort Union to dispatch the annual outfit for Fort McKenzie without carrying the smallpox along with it. The expedition was in charge of Alexander Harvey, one of the most noted and desperate characters which the fur trade produced. Harvey took every possible precaution, but in spite of his efforts the disease broke out in his party. He therefore thought it prudent to stop before he reached Fort McKenzie and send word to Culbertson, who had been in charge of the fort since 1834, when Mitchell left. Culbertson wisely decided to leave the cargo at the mouth of the Judith until the disease had run its course. There were large numbers of Indians encamped near the fort awaiting the arrival of the boat, and when they learned of the proposed delay they became suspicious and insisted that the boat should be brought up. Culbertson expostulated with them, but all in vain, and to avoid the capture and destruction of the boat and its crew, he yielded to their demands.

TERRIBLE MORTALITY.

The result was exactly what had been foreseen. The disease was communicated to the inmates of the post and to the Indians as well. The latter completed their trade and left the fort before the pest actually broke out among them, and the garrison remained for some time in ignorance of what their fate had been. For upwards of two months not an Indian was seen, and Culbertson, fearing the dreadful truth, resolved to go in search of them. With a single companion he set out for the Three Forks of the Missouri, where the Piegans usually spent their autumns hunting beaver. They finally came upon a village of about sixty lodges, only to find it absolutely deserted, with dead bodies strewn in every direction, and carrion birds of prey the only sign of life anywhere around. The smallpox had done its work well, and the few survivors of the village had fled in scattered groups among the surrounding mountains. The mortality among the Bloods and Blackfeet had been as great as among the Piegans, and Culbertson estimated the total loss among the three bands at six thousand souls. The Grosventres, for some cause, escaped with small loss.

The annals of Fort McKenzie during the next six years find their chief sensational interest in the exploits of Alexander Harvey. Many were the desperate deeds committed by him, and it required all the steadying authority of Culbertson to offset his sinister influence among the Indians. Harvey was, however, an excellent trader, and rendered the company good service. He was left in charge of the post during the occasional temporary absences of Culbertson at Fort Union, and in spite of his many outrages upon the Indians, and even upon the whites, was considered too valuable a man to lose.