3856 A. J. Jukes-Browne—Granite in a Boring at Bletchley. 
R. 331 belongs to I. Fitioni or I. hollingtoniensis, although, as J have 
remarked in the work cited, it is certainly distinct from I. Mantelli. 
I may add that the bone in that skeleton catalogued as a fragment 
of an ilium proves to be the glenoidal portion of the right coracoid. 
V.—Tue OccurRENcE or GRANITE IN A Borine at BLETCHLEY. 
By A. J. Juxus-Browns, B.A., F.G.S. 
N the winter of 1886-7 a boring was made at Bletchley Junction 
for the London and North-Western Railway Company, and 
acquired importance from the report that, after passing through the 
Oxford Clay, it had entered a mass of granitic rock.? Probably 
many readers of this MacazinE wondered why no detailed account 
of the boring was published after this announcement; but the reason 
was, that when inquiries came to be made, some uncertainty was 
found to exist as to the position and mode of occurrence of the 
granitic rock. My attention was recently called to the boring by 
learning that the water obtained from it was salt. I then ob- 
tained all the information I could with regard to the rocks passed 
through, and think the results are of sufficient importance for pub- 
lication. The interest naturally centres in the supposed occurrence 
of granitic rock at a depth of less than 400 feet from the surface, 
and it seems desirable that the facts with regard to this should be 
placed on record. 
The boring was made by Mr. Ebenezer Timmins, of Runcorn, 
under the superintendence of Mr. F. W. Webb, the Engineer of the 
L.N.W.R. Company. The work was personally directed by Mr. 
Arthur Timmins, to whom I am indebted for the particulars given 
below; Mr. A. Timmins tells me he had the first handling of all 
samples which were brought up, and that he took some trouble to 
ascertain the nature of the rocks through which the boring was 
carried, making analyses of several of the specimens himself. All 
this information he has generously placed at my disposal, and the 
following is his account of the boring. 
Old well 148 feet deep. Boring commenced from bottom of well. 
Level of surface about 260ft. O.D. :— 
Thickness. Depth. 
ft. in. fis 
1 Depthyottold wells eee ssececs — 148 0 
De LBS InN sedoodnobsoscucoacosqees 8 0 156 0 
See BIMENC ayAmsn eects awatermcmeancness 9 0 165 0 
AN BlAaCkKSHaleaeiake vs decease tees eee ee 1 0 166 0 
5, allan: CAN) Gugsbseaacoossnedaasbone6C 2 6 168 6 
Go Leieonvatt, Clan? SSsandnbooddeecrcocaaudanade Wf) 186 90 
(ee Bluenlimestonesascccesecesscecneee ee 1 0 187 0 
Slo TBRONWid ClEly GobposusbaocdababeanosHoode 5 0 192 0 
Oe Blwewimestonemecssseneseeeetectencete 12 0 204 0 
MOM MBlie\ clayey sus haces seeenaceeeeetes 8 0 212 0 
ILS Joly IWS KONE Kaspsconascosbcsoncunce | OY) Deh) 
IPAS TERN EN ERY Gogancdcobercseascoosesandesee 6 3 224 0 
oe BlueMimestoner ewe ieee nce ane 1 0 225 0 
1 Op. cit. p. 226. 
* See Prof. Hull’s letter, Grot, Maa. Dec. III. Vol. LY. p. 189 (1887). 
