1888 .] 
149 
[Cresson. 
examined. I have stated before that I was anxious to verify the 
several layers of the rock-slielter, and as the stakes of the railroad 
survey indicated that the place was doomed to destruction, for sev- 
eral weeks I followed the workmen as they slowly proceeded from 
D alley’s Road Crossing toward what is now Carpenter Station, a 
quarter of a mile distant. I had already seen what is called by the 
country people the “Indian Field” cut in twain by these invaders 
of nature’s solitudes, and must confess that it seemed to me a 
strange fatality that the shelter and the old Lenape council field 
stood directly in the line of destruction. When the work-gang 
reached Darley’s Road Crossing, the excavation began to lay bare 
the gravels. Towards Wilmington, on the southwest side of the 
bridge, the layers terminated in a thin skein, but a few inches in 
thickness, and the boulder line which Professor Wright will describe 
in detail dwindled away to mere pebbles. As the work progressed 
toward Carpenter Station, in the direction of Philadelphia, the lay- 
ers of brick clay widened somewhat, and the red- gravel deposit as- 
sumed a feature which seems to be better defined as we approach 
Wilmington, and less so to Philadelphia. I refer to the aqueous 
gravel deposit being subdivided, as it were, by its difference in 
color ; generally red above (the true Philadelphia red-gravel color), 
while underneath it is grayish-reddish white. This peculiarity will 
be apparent to you, when Dr. Wright displays his lantern slides. 
The boulders of the boulder line, too, seem to increase in size as 
Philadelphia is approached ; but I must not dwell upon these points 
in detail, interesting though they be, but tell you where the palseo- 
litlis were found. 
Toward midday of July 13, 1887, while lying upon the edge 
of the railroad cut, sketching the boulder line, my eye chanced to 
notice a piece of steel-gray substance, strongly relieved in the sun- 
light against the red-colored gravel, just above where it joined the 
lower grayish-red portion that I have mentioned. It seemed to 
me like argillite, and being firmly embedded in the gravel was de- 
cidedly interesting. Descending the steep bank as rapidly as possi- 
ble, the specimen was secured, not too quickly, for the workmen 
above were just beginning to tumble down a huge mass of boul- 
ders and gravel that had been undermined beneath, and then eased 
off, as they say, at the top. by crowbars. Upon examining my spec- 
imen, I found that it was unquestionably a chipped implement. 
There is no doubt in my mind about its being firmly embedded in 
