In June, 1780, he joined a party of Canadians and Indians who were sent from Mackinac to Prairie du Chien to secure the deposits of furs at the latter place, and prevent them from falling into the hands of the emissaries of George Rogers Clark from the Illinois, and the Spaniards from St. Louis. After a march through Wisconsin, this undertaking was successfully accomplished—the furs that could not be saved being burned to keep them from the enemy.[4] The following autumn, Long returned to Quebec never again to come to the “upper country.” He made one more successful trading expedition to unknown lands, by way of the Saguenay River and Lake St. John, penetrating the country east of Hudson Bay, and bringing back a rich cargo—in the very year that the Hudson’s Bay Company was pillaged by the French expedition of La Pérouse. Long returned for a year to England, his mother-land being entirely strange to him after fifteen years’ absence. He was, therefore, glad to fit out a cargo for another venture in the Indian trade of Canada. But his good fortune seems now to have deserted him—debt, lack of employment, and other difficulties drove him from one place to another. In the spring of 1785 he was in New York, where he pushed the claim of a Huron Indian through Congress. A fur-trading expedition among the Iroquois failed, and the British commandant at Oswego confiscated his goods. Taking refuge among his Loyalist friends near Kingston, he received a grant of land for his services, but debt drove him from that; and after securing some assistance from the authorities, he returned to England in the fall of 1788,[5] there to write and publish the volume of his adventures. He appears to have secured some patronage for this work, as is evidenced by the list of subscribers, and the dedication to Sir Joseph Banks. He also consulted the best available authorities on Indian traditions and Canadian history, and seems to have taken pains to verify his own experiences and observations, without slavishly following his authorities.[6] In his defense of the Hudson’s Bay Company, there is to be noted either a desire to secure its favor for future services, or pique in relation to the new North West Company, under some one of whose partners he had undoubtedly served. The book, which was published in 1791, attained considerable popularity. It was favorably reviewed in the _Monthly Review_ (June, 1792), and translated into both French and German. The French translation, made by J. B. L. J. Billecocq, with notes by the translator (but without the vocabularies, a fact deplored by French philologists),[7] appeared in 1794, and again in 1810. Two German translations were made, the first by B. Gottlob Hoffmann, issued in 1791; the second by G. Forster, published in Berlin the following year.