JOHN MCKUSICK.--Prominent amongst the pioneers of the St. Croix valley, and deserving of special mention for his enterprise and public spirit, is the subject of this sketch. He was born in Cornish, Maine, in 1815; received a common school education; came to Illinois in 1839, and to St. Croix Falls in 1840, where he engaged in the lumbering business, getting logs to the Falls mill, and sawing them. Through industry and economy he saved enough to enable him to become part owner and builder of the first mill in Stillwater. He has held many positions of trust. He served as state senator in 1863-64-65 and 66. He was active in aiding to secure the land grant to build railroads into Stillwater, in the welfare of which city he has ever manifested the deepest interest. He has been one of the largest proprietors, and most liberal in improving and adorning the city, has encouraged a sound system of finances, and has steadily opposed the bonding system. Mr. McKusick was married to Phebe Greely in 1847, who soon afterward died. He married his second wife, Servia Greely, in November, 1849. He has three children living, Newton, Chester and Ella. Mrs. McKusick died Feb. 18, 1887. [Illustration: John McKusick] WILLIAM MCKUSICK, a younger brother of Jonathan E. and John McKusick, came to Stillwater in 1847, and engaged in lumbering. He was a member of the fifth territorial house, and a senator in the second, sixteenth and seventeenth state legislatures. In 1870, with the firm of McKusick, Anderson & Co., he built the large saw mill at Houlton, opposite Stillwater. In 1882 he made his home upon a farm at Big Stone Lake. NOAH MCKUSICK, another brother, came to Stillwater in 1847, followed lumbering some years, removed to Oregon, and died there in 1886. ROYAL MCKUSICK came to the valley in 1848, and died a few years later, leaving a large and respectable family. IVORY E. MCKUSICK.--Ivory E., brother of John and J. E. McKusick, was born in Maine, July 2, 1827. In 1847 he came to Stillwater, with which city he has since been permanently identified. He spent two years working in the old mill, the first built at Stillwater, and then engaged in lumbering until 1859. In 1862 he was appointed prison guard, and served two years. In 1864 he was in the service of the government, and helped build Fort Wadsworth, Dakota. He served as surveyor general several years, and later has engaged in the forwarding and commission business. He was married to Sophia A. Jewell, Feb. 9, 1854. He is a man of probity and merit.