In the remaining portion of the Northwest Territory, the number of lines was relatively not so great; and extended areas, as in the western and northern parts of Indiana or the southeastern part of Illinois, contained few or no lines so far as can now be discovered. In western and northern Illinois the conditions were more favorable, and the multiplicity of routes is such that on account of the fusion, division and subdivision of roads it is impossible to say how many lines crossed the state. In Michigan the case is not so complicated, and one can trace with some clearness six or seven paths leading to Detroit. Iowa, not a part, however, of the old Northwest Territory, was traversed by lines terminating in Illinois, and therefore deserves consideration here. In the southeastern part of the state there were several short routes with initial stations at Croton, Bloomfield, Lancaster and Cincinnati, all of which had terminals no doubt along the Mississippi, though it has been possible to complete but two of the routes. In southwestern Iowa, Percival and the three roads branching from it are said to have supplied means of egress for slaves from Missouri and Nebraska through three tiers of counties ranging across the state in lines parallel with the north boundary of Missouri. John Brown took the northernmost of these parallel roads in the winter of 1858 and 1859, when he led a company of twelve fugitives from Missouri through Kansas to Percival on their way to Chicago and Detroit. [Illustration: UNDERGROUND LINES OF MORGAN COUNTY, OHIO. Drawn by Thomas Williams.]