OF MASON COUNTY, INCLUDING A SKETCH OF THE EARLY HISTORY OF ILLINOIS, ITS PHYSICAL PECULIARITIES, SOILS, CLI- MATE, PRODUCTIONS, ETC. INDEX. PAGE. Sketch of the early history of Illinois.. Illinois river and tributaries.. Sangamon river and tributaries. Sangamon, Menard and Tazewell counties. 30 39 40 43 44 46 52 67 73 8o 86 ΙΟΥ ..118 .230 .234 .256 .266 .274 .277 .347 |