338 REPORTS ON THE STATE OF SCIENCE, ETC. 
greatly complicated the task of excavation in this area, but I was helped by 
the fact that the stratification showed up quite clearly in the S.E. wall of 
the trench. The bed-rock sloped downwards from 12:60 m. to 15°50 m. 
below datum over more than three-quarters of the Locus, but was never 
reached in the extreme S.W. strip. 
‘Layer G (Tayacian) showed a maximum thickness of 3:50 m., but 
thinned out very rapidly to the S.W. The S.W. side of the Locus was 
occupied exclusively by Layer F, which here descended nearly vertically. 
A considerable number of good hand-axes came from this restricted area, 
but no bones were found. 
‘Excavation was brought to an end on August 25, at 15:50 m. below 
datum, as the S.W. strip of the trench was now too narrow to allow of further 
digging. Layers F and G at this point plunge very steeply indeed to the 
S.W., and it is plain that a large swallow-hole lies under the unexcavated 
part of Locus W. It seems probable that this hole was already more or less 
filled with deposit at the time that Layer G was laid down, and that the 
subsidence of G, F and the base of E is due to subterranean drainage, which 
at some time during the Acheuleo-Mousterian occupation of the cave 
caused the deposits filling the swallow-hole to filter away, and drew the 
existing archzological layers into the swallow-hole in their place. 
“The excavation of this swallow-hole would involve two or three more 
seasons at least, and as it is doubtful whether the results would justify the 
expenditure of so much time and money, the excavation of the Tabin may 
be considered as complete for purposes of publication. 
*D. A. E. Garrop.’ 
The Committee asks to be reappointed, with a further grant, in order to 
make adequate arrangements for the publication of this very important 
piece of work. : 
DERBYSHIRE CAVES. 
Thirteenth Interim Report of Committee appointed to co-operate with a 
Committee of the Royal Anthropological Institute in the exploration of 
caves in the Derbyshire district (Mr. M. C. Burkitt, Chairman ; 
Dr. R. V. FAVELL, Secretary ; Mr. A. LesL1E ARMSTRONG, Prof. H. J. 
FieureE, Miss D. A. E. Garrop, Dr. J. WILFRID Jackson, Prof. L. S. 
Patmer, Mr. H. J. E. Peake). 
_ Work during the current year has been confined to Creswell Crags, where 
Mr. Leslie Armstrong, F.S.A., has continued his excavations and reports 
as follows : 
‘ Since the presentation of my last report the excavation of the section 
in the rear of the main chamber, then in progress, has been completed, and 
a typical vertical section, showing the entire stratification of the cave 
deposits, a total thickness of 19 ft., is now exposed to view. 
‘The work upon this section has been carefully carried out so as to 
facilitate the permanent preservation of this section and to prevent, as far 
as possible, any slipping of the face. As now exposed, it is crowned by 
a layer of hard crystalline stalagmite, from 9 to 12 in. in thickness, which 
has been left projecting from 1 to 2 ft. beyond the face of the underlying 
deposit, in order to reveal the nature of the layer sealing the cave-earth 
