considered 
"The late eminent glacialist, Dr. Carvill Lewis, 
them rather modern, and also maintained that what Dr. Abbott 
believed to be undisturbed layers, were those of an ancient 
talus. These statements D }*. Lewis made at an open meeting of 
the Academy of Natural Sciences, Philadelphia, not long be¬ 
fore his regretted death, concerning specimens from Dr. Abbott 
which I then laid before the Academy. It is the opinion of 
most glacialists that the Trent on-gravel finds require further 
study before we can assign their probable age. I have myself 
found these chipped stones in the Trenton talus, but never in 
clearly undisturbed strata." 0 
D. G.Brinton jin Science, October 28, 1892. p. 249. 
