All that portion of Indiana lying north and west of the Wabash, is essentially a part of the Grand Prairie. "Of the twenty-seven counties in Indiana, lying wholly or partially west and north of the Wabash, twelve are prairie, seven are mixed prairies, barrens and timber, the barrens and prairie predominating. In five, the barrens, with the prairies, are nearly equal to the timber, while only three of the counties can be characterized as heavily timbered. And wherever timber does occur in these twenty-seven counties, it is found in localities favorable to its protection against the ravages of fire, by the proximity of intervening lakes, marshes or watercourses." On the Indiana side, the most pronounced of the tracts of prairie occur in western Warren, Benton, southern and central Newton, southern Jasper, and western White and Tippecanoe. Benton was originally covered with a great pampas of blue-stem, high as a horse's head, interspersed here and there with swamps of willows and bull grass, while only narrow fringes of timber along the creeks, and some five or six groves of timber and woodland, widely scattered, served as land marks to the early traveler. Those who early observed and explored the grassy savannas of Indiana and Illinois, always maintained that they were kept denuded of trees and forests by the action of the great prairie fires. Among those who have supported this theory are the Hon. James Hall, author of "The West," published in Cincinnati in 1848; the Hon. John Reynolds, former governor of the state of Illinois, and the Hon. John D. Caton, a late judge of the Supreme Court of Illinois. Caton's observations on this subject are so interesting and ingenious that we cannot refrain from making the following quotation: