WILLIAM H. HOOPER.--This gentleman attained considerable notoriety in later life as an influential Mormon and a delegate to Congress from Utah from 1859 to 1868. He was a man of unquestioned ability and an eloquent speaker. His plea for "religious liberty," made against the Cullom bill, is said to have been one of the most eloquent speeches ever delivered in Congress. Mr. Hooper was born in Warwick Manor, Maryland, Dec. 25, 1813. In 1835 he moved to Galena and engaged in mercantile business. In the panic of 1838 Mr. Hooper and his partner failed to the amount of $200,000, but, after years of struggling, the debt was entirely paid. In 1843 Mr. Hooper engaged in steamboating as clerk on the steamer Otter, on the Upper Mississippi and its tributaries, and was well known at Stillwater. His boat in 1843 landed the mill irons for McKusick & Co.'s mill. In 1844 he built the steamer Lynx and several other boats, the last being known as the Alex. Hamilton, of which he was part owner. This was burned at St. Louis in 1849, which left him again penniless. In 1850 he emigrated to Salt Lake and there in his business enterprises greatly prospered. Although he espoused Mormonism and became one of its leaders, he was opposed to polygamy. He died in Salt Lake City. JAMES H. SPENCER.--James H. Spencer came to Stillwater in 1845, a boy of sixteen. His educational privileges had been limited, but he was ambitious and studious, and by his own unaided exertions acquired a practical business education. He followed lumbering and exploring, and was employed as state timber agent for fifteen years. He was born in Boone county, Missouri, in 1829, and was married to Rose M. Winters, in Stillwater, in 1869. JOHN T. BLACKBURN.--The brothers Blackburn were born in Cincinnati, Ohio, John, the elder, in 1823. He came to Stillwater in 1844, and has since been actively engaged in lumbering. His home has been at Stillwater, Marine, Taylor's Falls, and Shell Lake, where he now resides. JOSEPH T. BLACKBURN.--Joseph, the younger brother, was born in 1834, and in 1847 came to Stillwater. He has followed lumbering and Indian trading. He has made his home at Stillwater, at Taylor's Falls, and, since 1860, on Totogatic river, in Douglas county, Wisconsin, ten miles from Gordon. Mr. Blackburn enjoys wilderness life, is eccentric in manner, and attends strictly to his own business. HORACE K. MCKINSTRY.--We have no data of Mr. McKinstry's early life. He came to Stillwater in 1846. His family consisted of his wife, three daughters, and son, John, who afterward married the eldest daughter of Anson Northrup. Mr. McKinstry was a justice of the peace in 1847 and 1848, and was engaged in mercantile business the two succeeding years. He removed to Maiden Rock, Wisconsin, a year or two after and died there March 12, 1884.