245 
NOTES ON SECTIONS EXHIBITED I)URIN(J THE EXCAVATION OF THE 
ALEXANDRA DOCK EXTIINSION, HULL. 
BY W. II. CROFTS. 
(Kmd Xovpmher Sfh, 1900.) 
This extension is really a small clock, connected Nvith the 
older Alexandra Dock b}^ a short channel opening into the 
eastern side of latter. The extension has an area of about 
seven acres, its centre being about Lat. 53° 44' 40", and W. Long. 
0° 17' 15". It is situated on the foreshore forming the northern 
bank of the river Humber, immediately to the east of the 
Alexandra Dock, and near to but west of the eastern boundary 
of the city of Hull. 
The site was originally a mud cranch, the high side of which 
reaches to a height of 12 ft. above O.D., being the level of 
H.W.O.S.T. L.W.O.S.T. being 10 ft. below O.D., that, of 
course, is the height of the low side at its apparent limit. The 
high side of the cranch abuts against an artificial bank, formed 
to protect the low lying land north of the Humber (in many 
places only 8 ft. above O.D., and even less in a few instances)^ 
against the estuarine tides which have gradually warped up the 
cranch to at least 4 ft. above the adjacent country. The date 
of the first formation of this bank is unknown, but it must 
have been many hundred years ago ; in fact, it is quite certain 
that there were banks here before the Norman Conquest, for there 
are villages mentioned in Domesday Book which were on the east 
side of Hull, and which therefore must have been protected by 
a bank or banks.'-'^ On the original surface of the site, part of 
the excavated material from the Alexandra Dock itself had been 
deposited, roughly levelling it up to about 17 ft. above O.D. 
The general excavation was carried down to 21 ft. 6 in. 
below O.D., the floor of the dock being formed at this level, and 
trenches for- the foundations of the dock walls were excavated to 
from 30 it. to 34 ft. below O.D. The formations exhibited by 
* King Edward I. and King.ston-upf>n-lIull. J. R. Boyle, F.S.A. 
