APPENDIX. 
315 
(F.) Levels around Abbeville referred to in the paper. As the metres are there 
reduced to English feet, I here give the copy of the original document, for which I am 
obliged, through M. Bouchee de Peethes, to the Engineers “ des Fonts et Chaussees.” 
Designation des Carri&res. 
Plus hautes 
eaux de 
retenues 
artificielles 
de la 
Somme 
en 1857. 
Hautes 
eaux extra- 
ordinaires 
de la 
Somme 
en 1841. 
Mardes 
extraordi-- 
naires de 
vives eaux 
au port de 
St. Valery. 
Niveau 
de la 
h St. Valery 
sur 
Somme. 
moyen 
Mer 
au Havre. 
Carriere de cailloux a I’extre- 1 rn • ^ j i n ■ 
•i.' t, J r Terrain nature! au sommet de la Camere 
mite, cote gauche, du fau- 1 t, a ^ i u - 
Aupq j mvelee du terrain exploite 
Carriere de cailloux de la 1 m . , , t. ^ r^ 
, J 1 ' 1 Ti/T Terrain nauurel au sommet de la Carriere 
portedubois presleMou- ^-d • i' j ^ i -t' 
^ ^ j Tar tie niyelee du terrain exploite 
Sommet de la butte du Moulin Quignon 
court appartenant aux S- }^. C^nere 
Dufour et Coulombel ... j ’ 
Tertre sur lequel est place le moulin de I’argilliere (Mencbecourt) 
m&tres. 
21-95 
19-95 
27-15 
25-15 
31-11 
12-97 
7-77 
51-49 
metres. 
21-41 
19-41 
26-61 
24-61 
30-57 
12-43 
7-23 
50-95 
metres. 
20-65 
18 55 
25-75 
23-75 
29 71 
11-57 
6-37 
5009 
metres. 
27-02 
25-02 
32-22 
30-22 
36-18 
18-04 
12-84 
56-56 
metres. 
29-16 
27-16 
34-36 
32-36 
38-32 
20-18 
14-98 
58-70 
SabUeres* appartenant au S' Papillon situees a Mautort a gauche de la route f centre de cette carriere se trouve^ 6 metres 
imperiale No. 25 a I’entree de ceUe qui conduit a Gamacbes j P d^ssus du niveau de a mer au Havre (It 
^ ^ 1 IS 2'OU metres more to the top oi the pit.) 
Le niveau moyen de la Somme est a 6’10 metres au dessus du niveau de la mer au Havre. 
Le niveau de la vaUee pres la station du cbemin de fer a Abbeville est a 7'60 metres au dessus du niveau de la mer au Havre. 
Levels around St. Acheul, from a ground plan obligingly furnished by M. Pinsaed. 
Valley of the Somme near La Neuville 
metres. 
20*42 
English feet. 
67 
These heights are 
The railway at La Neuville 
25-33 
83 
Midway between La NeuviUe and St. Acheul 
3716 
122 
above the mean 
High road, suburb of Amiens, at iunction with the Cagny road 
32-09 
105 
tide at Havre. 
High road, in front of the Monastery of St. Acheul 
44-57 
146 
To reduce them 
Mean surface at T. and E. Ereville’s pits 
47-50 
156 
■ to the mean 
High road, opposite by-road leading to the Cagny road 
42-15 
138 
tide at St. Va- 
Cagny road, end of the preceding by-road 
51-64 
169 
lery, deduct 
On the Cagny road, 273 yards south-east of last point 
56-88 
187 
217 
2-14 metres, or 
i The highest point of the hill, 5 furlongs south of the pits, on the road to Cottenchy . . . 
60-10 
J 
7 feet. 
(G.) M. Bouchee de Peethes has found that the silt and peat beds of the valley at 
Abbeville contain near the surface mediaeval remains ; lower Homan remains ; and, beneath 
all, Celtic remains {op. cit p. 182 to 206). A trench at La Portelette showed — 
ft. in. 
1. Made ground and alluvial soil 10 
2. Calcareous tufa, with traces of plants and bones (a small statuette and Roman coins ?) 6 6 
3. Bluish gray clayey sand, with ground flint and jade Implements, worked hones, and 
bones of Beaver, Bear, Boar, Deer, &c 10 ' ^ 
4. Peat, enclosing Celtic sepultures, coarse pottery, and rude bone and flint-implements 10 
5. Muddy sand and over flint gravel, reposing upon an irregular surface of chalk 3? 
At a short distance from Porte Mercado the silt and peat with medijBval coins and Roman remains are 
20 feet thick, and overlie 2 feet of muddy sand, containing a mass of rude flint-implements and coarse pottery. 
Section by M. Pinsaed of a boring in the valley of the Somme at Amiens. 
1. Vegetable soil and silt, with bones of Deer, &c 7 61 
8 8 Ul feet. 
3. Gravel, very similar to that of St. Roch and St. Acheul (newer, on my view. — J. P.) 14 10 J 
This level was taken in error for one I wished to have of the pit where the flint-implements have been 
lately found, on the slope of the hill on the road to Moyenville (see “ Pits,” Section 1, Plate X.). 
