288 
ME. PEESTWICH OX FLIXT-IMPLEMEXTS. 
There is a pit of similar gravel at St. Gilles, on ground 17 feet lower and distant about 
half a mile to the southward. At neither of these pits did we ourselves find any flint- 
implements, nor had the men any ; but here again they affirmed they often found them, 
chiefly in the lower and middle part of the undisturbed gravel, together with large bones. 
Between the Moulin Quignon and the walls of AbbeAille, there were formerly some 
gravel pits, in which a large number of worked flints were discovered ; but the pits are 
now levelled, and the ground occupied as a “ Champ de Mars.” The town itself in 
part stands upon a bed of drift gravel and sand. In some excavations (now closed) 
between the Hospital and the ramparts, M. Boucher de Perthes also found remains of 
the Mammoth together with several flint-implements^ {ante, p. 279). 
I examined one deep excavation (fig. 4) now in progress on the X."\V. side of the 
town. It exhibits thick beds of gravel spread out horizontally, with some interstra- 
tifled seams of loam and sand, in which latter I found a few fragments of land and 
freshwater shells. The level of the ground here is rather lower than at the adjacent 
Menchecourt pits (see Sect. 2, Plate X.). 
Section in the moat outside the town walls at the Forte 2Lercade, 1S59. 
ft. in. 
a' . Made ground 6 0 
b. Angular flint-gravel in brown and ocbreous sandy 
clay (corresponds with b of figs. 1 and 2) 5 0 
c. Loam (loess), with tbin seams of grit and gravel 6 fi 
d. Light-coloured sand and patches of gravel ; frag- 
ments of shells {Limneus and Helix') 1 8 
e. Sub-angular ochreous and white flint-gravel. Teeth 
of Elephas primigenius (one milk tooth). Ee- 
poses upon an irregular surface of chalk ... 2 to 4 0 
Several flint-implements, generally deeply stained, 
have been found heref. 
Amiens . — On the verge of the hills, and at a distance of three-fourths of a mile S.E. 
from the railway station, are situated the very interesting and extensfr'e pits of St. Acheul 
(Plan B, Plate X.). According to the measurements of M. Pixsard, the mean height 
of the ground here is 149 feet above the mean tide level at St. Valery, and 89 feet above 
the Somme valley, towards which it slightly inclines, till as it approaches the valley 
the ground falls by a more rapid and sudden slope, while southward it stretches with a 
gently undulating and gradually rising surface for many miles. The site of the pits is 
coUectiou of the Eoyal Irish Academy, “more or less of au obtusely triangular figui'e in its section.” In 
all respect the specimens he describes and those I have seen in the British Museum, agree with the Abbeville 
specimens. M. de Perthes has a number of similar specimens from the pits at Menchecourt (fig. 3, Plate 
XII.), Moulin Quignon, and Mautort, and Dr. Eigollot figimes one from St. Acheul. — September 1860. 
* See Antiq. Celt, et Anted, vol. i. p. 247 to 264, for particulars and careful sections of these excavations, 
t When last there, a broken specimen, now in my possession, was discovered in the lower part of e, 
Avithin a few inches of the gravel e, the sand d being, at that spot, almost wanting.— July 1860. 
