980 The American Naturalist. [December, 
There have been found in the District (Table I) but two 
caches of quartzite, containing together only 12 leaf-shaped 
blades. These are according to Mr. Holmes’ theory, “the 
entire product of the shops” (p. 15), which “had been carried 
away to the villages and buried in the damp earth (cached) 
that they might not become too hard and (or) brittle.” This 
was a sorry product of so extensive a quarry as Piney Branch 
with the “500,000 pieces of waste and failures” found therein 
by Mr. Holmes; and must have been a sore disappointment 
to even the cynical and thriftless Indian. 
Plate XXIII represents 20 specimens of a cache of 32 arrow 
or spear heads and leaf-shaped implements found near Pierce’s 
Mill, Rock Creek. Most of the specimens are broken. They 
are of porphyritic felsite and, therefore, never had any rela- 
tion with the quartzite quarry at Piney Branch. 
Should it be urged that some of the leaf-shaped blades may 
not have been cached or, if so, that the caches had been dis- 
turbed and the blades scattered over the surface, I have made 
a schedule of these, (table II), which shows a total of 1,948 leaf- 
shaped blades found on the surface, not cached, of which 1,065 
were of quartz, felsite, argillite, etc., and but 883 of quartzite. It 
TABLE II. LEAFEDSHAPED BLADES—NO7 CACHED. 
g phe an eee Eaa ae r Pd is 
uartz. artzite. elsite n er. as 
ya Rhyolite. | Sandstone. | Chert. 
Locality. 
No. of No. of No. of a of No. of 
Implts. Implts. Implts. Implts. Implts, 
Bonnike 4 300 100 100 
2 30 2 2 1 
Bank 100 100 40 
Jones Landing 50 20 10 
y Bran 15 | 
17 
Little Falls 1 215 303 202 
nacostia 2 } 
Pierce’s Mill | 
Cabin John 22 6 1 
rd ET EEEE OR NE 
U. S. Natl. Mus. Miscl. Collec- | 1 
tions, from D. C., generally. 148 134 | 5 10 
157 | 883 | 541 | 364 3 
aa 
Total implements, quartzite, 883 
Total implements not quartzite, 1065 
