56 



continued uninterruptedly to join it again at the southwest termini, 

 whereas the inner wall was perfectly joined at the southeast junction, 

 but itself afforded a entrance at the southwest junction with the 

 enclosure of the larger field. The two outer ridges would, according 

 to this surmise, have formed a kind of a labyrinthian or masked en- 

 trance of this shape: 



It has also been deemed advisable, for the present at least, not to 

 indicate a supposed mound in the middle of the outer enclosure where 

 a rise of about a foot is noticed but which seems rather a product of 

 nature. 



On a promontory of the southeast extremity "B," upon what is 

 known as "Mitman's Hill," little beyond the Springfield and Dayton 

 turnpike (marked on the plan "p"), there are found four nearly 

 circular depressions, each occupying a projection of the hill, separa- 

 ted from each other by inlets, which, farther down, are quite 

 steep ravines. Each of these depressions shows a little rise in the 

 center, perhaps produced by the accumulation of the soil, thrown in 

 from the circumference. On the whole these four depressions seem of 

 a more rude nature than the earthworks on Haddix Hill. 



In conclusion it might be mentioned, that in and around Osborn a 

 considerable number of mounds and tumuli is found. They are, for 

 the greater part, situated in cultivated fields, and hence through 

 plowing down greatly reduced, altered in shape and less imposing, 

 though some are, notwithstanding these unfavorable circumstances, 

 of still imposing dimensions, as the one on KauiFman's farm (about 

 one mile beyond Mad river), which is still fully fifteen (15) feet high 

 and eighty (80) feet in diameter. 



Five miles up Mad river, at Enon, is again a large mound on a~ 

 prominent hill, and others still farther up along the river bed crown 

 the most important hills, where they may also have served as out- 

 looks and signal stations, for the friendly intercommunication, or 

 warnings and signs of distress, perhaps, among the lost and enigmatic 

 tribes of our now modern country. 



The peculiar form of the solitary earthworks described above singu- 

 larly coincides with the following description of aboriginal remains, 

 mentioned in the "Report of a Geological Reconnoissance, made in 



