260 Wisconsin Academy of Sciences, Arts , and Letters. 
South of Michigan and Wisconsin, the gaps were filling in. 
Through a consolidation of lines of Pennsylvania, Ohio, and 
Indiana, the Pittsburg, Ft. Wayne, and Chicago Eailroad 
emerged as a system, entering Chicago over its own tracks in 
1858. 3 Crossing this road diagonally at Ft. Wayne, the neu- 
cleus of another system came down from Toleda in 1855. In 
1856 this system, later known as the Wabash, was extended to 
Springfield, Illinois. It absorbed and extended the pioneer 
Horthem Cross, and reached the Mississippi in 1859. 
Poads running from east to west attracted, on the whole, 
more attention than those from north to south, and the interest 
s Wilson, W. B., Hist of the Pennsylvania Rr. Co. 
