It is not known exactly how or when the name of St. Croix came to be applied to the beautiful river bearing it, but La Harpe, in his "Louisiana," gives the most plausible account of its origin: "This name is not ecclesiastical in its associations, but named after Monsieur St. Croix, who was drowned at its mouth." Le Sueur, who explored the Upper Mississippi in 1683, says he left a large river on the east side, named St. Croix, because a Frenchman of that name was drowned at its mouth. As Duluth was the first white man to embark in the waters of the St. Croix, descending it in canoes, from near Lake Superior, which he did in 1680; and as Hennepin and La Salle ascended the Mississippi the same year, the name could not have had an earlier origin, but may be fixed as given sometime between 1680 and 1683. An old map in my possession, one hundred and twenty-five years old, gives the present name of the river and lake. The St. Croix valley embraces an area of territory from 20 to 90 miles in width, and about 120 miles in length. Its northern water, Upper Lake St. Croix, is about 20 miles from Lake Superior. The southern portion is a rich prairie country, interspersed with groves of hardwood timber. The more northern portion is interspersed with groves of pine, tamarack, cedar, balsam and hardwoods. The whole district, with a small exception, is a cereal country. It abounds in wild meadows, and much of the swampy portion will ultimately be utilized by ditching, which will transform it all into a good stock raising country. About eight-tenths of this entire valley is fitted by nature for agriculture. Wheat, the leading cereal, averages ten to thirty bushels per acre; the growth of tame grasses can not be excelled; vegetables grow to wonderful size; native wild fruits abound; cultivated fruits are being successfully introduced; cranberries are being cultivated in the northern part. Wheat, stock, and pine lumber are the principal articles of export. The southern portion is well watered by the St. Croix and its tributaries--Kinnikinic, Willow, Apple, Sunrise, and smaller streams, lakes and springs. The northern portion is abundantly watered by the St. Croix and tributaries--Wolf, Trade, Wood, Clam, Yellow, Namakagan, Rush, Kanabec and Kettle rivers. Small streams and lakes are numerous, of which only the largest are named on the maps. The valley is abundantly supplied with water power, capable of running enough manufactories to work up all the products of the country. The soil is, as a general thing, dry and arable. April and May are the seeding months. Crops mature, and are seldom injured by frosts. The whole country adjacent to this valley will answer to this general description.