1002 The American Naturalist. [December, 
minative value in Europe, by what process of reasoning can it 
be argued that man, living thousands of miles away, has pro- 
duced the same peculiar variety, simply because he lived with 
a similar group of extinct animals? Another reason, perhaps 
equally potent, is that only a very limited number of the stud- 
ents of early man in America have made any lengthened study 
on the spot of the conditions under which these remains are 
found in Europe. If the conditions are to be similar in 
America, then this would appear to be a necessity. If they are 
unlike, as is very possible, yet there must be sundry points of 
resemblance, and it is surely of value to proceed to the study 
of the unknown by familiarizing the mind with the date of a 
known and accepted condition. To sum up in a few words— 
let intelligent observers, trained to use their eyes, knowing 
what constitutes evidence, and capable of recording it, let 
such men work over the possible sites of the American Conti- 
nent, and the result of their labors will, without any doubt, be 
of the greatest value to science, whether paleolithic man be 
found or not. But it is of the first importance that the explor- 
ers be trained men. The investigations of men without the 
necessary knowledge not only causes the results to be of little 
present value, but their work destroys the very evidence upon 
which alone true knowledge can be founded. 
