1896.] Piney Branch (D. C.) Quarry Workshop. 981 
is a part of Mr. Holmes’ theory that “the working of such a 
quarry led inevitably to the production of blades in numbers 
(meaning in great numbers), and it follows that they were re- 
moved “in numbers” (p. 18), but my examination demon- 
strates the error of this theory, for it shows the blades of 
quartzite (which alone could have been carried from Piney 
Branch Quarry) to be in the minority. 
Again, Mr. Holmes theorizes (p. 18) that a “time came for 
flaking them (the blades) into the final forms, knife-blades, 
scrapers, perforators, and arrow and spear points required in 
the arts.” Therefore, I made still another table (III) to show 
any of these final forms which might possibly have been made 
from leaf-shaped blades; and, again, we find the theory not 
TABLE III. ARROW AND SPEAR HEADS WHICH MIGHT HAVE BEEN MADE FROM 
L 
EAF-SHAPED BLADES. 
Porph Argillite, 
Quartz, | Quartzite, | _felsite | ae ilate. | SAP- 
Rhyolite, iron stone. a 
Locality. 
No. of No. of No. of No. of No. of 
Implts. Implts. Implts. Implts. Implts. 
Bennings 15 15 7 2 
300 7 50 25 
ON AS SAE OEE ES 200 75 300 50 
OME LAINE sorotsi assis 100 50 50 25 
Sa ney Branch..se.sessavosssssissssiss 
acostia 2 
tittle Falls 102 200 304 50 
Falls Church, Va., 37 1 8 
4 1 
Piscataway . 3 
U. S. Natl. Mus. Mis. Collec- 8 
tions, from D. C., generaliy. 149 209 15 13 2 
869 664 728 223 10 
Total implements, quartzite, 694 
Total implements not quartzite, seneeseeeee 1840 
2534 
borne out by facts, for of all these leaf-shaped forms, number- 
ing 2,634, only 694 were of quartzite and could have come 
from Piney Branch quarry. Thus, it appears that of the leaf- 
shaped blades found in the District and its environments, 
cached or not cached, the greater number have been of other 
material than quartzite, and must have come from other lo- 
calities than Piney Branch quarry. Is not all this cumulative ` 
evidence of error somewhere in Mr. Holmes’ theory? 
