found: Wikipedia, July 25, 2007:Michigan Territory (Michigan Territory was an organized territory of the U.S. in the early 19th century, between June 30, 1805 and January 26, 1837, at which point it became Michigan, the 26th state of the Union; Michigan Territory was est. by an act of the U.S. Congress on Jan. 11, 1805, effective June 30 of that year. The act defined the territory as "all that part of the Indiana Territory, which lies North of a line drawn east from the southerly bend or extreme of lake Michigan, until it shall intersect lake Erie, and East of a line drawn from the said southerly bend through the middle of said lake to its northern extremity, and thence due north to the northern boundary of the United States") Indiana Territory (Indiana Territory was an organized territory of the United States from 1800 to 1816; included almost all of the upper peninsula of present-day Michigan and the western half of the lower peninsula; eastern half of Michigan was added to the Indiana Territory when Ohio was added to the Union in 1803; area of the territory was further reduced in 1805 by the creation of the Michigan Territory) Illinois Territory (Illinois Territory originally included areas that became the states of Illinois, Wisconsin, the eastern portion of Minnesota, and the western portion of the upper peninsula of Michigan. As Illinois was preparing to become a state, the remaining area of the territory was attached to the Michigan Territory and ceased using the name Illinois Territory)
