Human Foot-Prints in Solid Limestone. 31 
The precise character of the tools which may have been em- 
ployed, we cannot determine; but this seems evident; a people 
capable of fashioning figures of porphyry, arrowheads of flint, and 
mortars of granitic rocks, must have had tools capable of excava- 
ting a fraction of an inch out of a small surface of limestone. 
I have in my possession, an axe found amongst the antiquities of 
this country, wrought out of a boulder composed of hornblende 
and. minute crystals of felspar; a rock which yields with great 
difficulty to the knife. ‘This Indian relic has an admirable finish, 
shows not the smallest scratch or tool mark, reflects light, and»is; 
tothe touch, smooth as polished marble. I have endeavored here 
to represent it, (Fig. 4,) that the reader may judge of the symmetry 
Fig. 4. 
Indian axe, of hornblende rock. 
it exhibits, the fine edge to which it is brought and the labor 
necessary to work so wall: finished an instrument out of so hard 
a material. The race that could make such an axe ont of a tough” 
hornblende boulder, may well be conceived capable of engraving 
oh a limestone slab impressions as skilful and highly finished as 
those before us; more especially as much of the finish observable 
