WARREN COUNTY. 391 
Scioto and Miami valleys are referred for their origin to a people whom, 
in default of positive knowledge, we call the mound-builders. Arche- 
ology, in some of its subdivisions, is loosely connected with geology, and 
an account of these remarkable memorials of an extinct race might 
properly enough find place in a geological report of the territory within 
which these monuments occur. They are so numerous and interesting 
in this region, however, as to deserve an amply illustrated volume rather 
than the passing notice which is all that could be here given to them. 
In the reports already published on the counties of the Third Geological 
District, a bare reference has been made to the more interesting and con- 
spicuous of these works found within their respective areas. To this 
list must now be added Fort Ancient. The remarkable earthworks | 
known by this name, are perhaps better known than any others in 
Southern Ohio. They are located in a populous district, they are easily 
accessible, being within a stone’s throw of the station on the Little 
Miami Railroad, known by the same name, and they have been less eb- 
scured by cultivation and occupancy than most works’of this class. 
Prof. John Locke published, more than thirty years ago, a survey plat 
of the entire works, accompanied with a brief description, and since that 
time, many accounts have been given to the public in archeological 
works, in scientific journals, and in newspapers. A thorough and sys- 
tematic exploration is, however, still a desideratum. Recent examina- 
tions go to show that such explorations would be rewarded by discov- 
eries, which would give to theories of origin and use a much better 
foundation than they have hitherto had. 
