252 



EEPORT — 1902, 



It will be seen from this report that during the deposition of the 

 upper strata the Plunkett Cave was inhabited for a long time by men who 

 used domestic animals and marine molluscs, and had implements of iron, 

 bronze, and polished stone, and who, in the earlier part of this period, 

 were contempoi-aneous with the reindeer and probably with the bear. 



In the subjacent clay there are evidences, left during a previous epoch, 

 that bears then inhabited the cave undisturbed by human intrusion. 



Erratic Blocl-n of the British Isles. — Report of the Committee, consistinrj 

 of Mr. J. E. Mark (Chairman), Mv. P. F. Kendall (Secre- 

 tary), Professor T. G. Bonney, Mr. C. E. De Hance, Professor 

 W. J. SoLLAS, Mr. E. H. Tiddeman, Rev. S. N. Harrison, 

 Dr. J. HoRNE, Mr. P. M. BuRTOX, Mr. J. Lomas, Mr. A. R. 

 DwERRYHousE, Mr. J. W. Stather, Mr. W. T. Tucker, mid 

 Mr. P. W. Harmer, apjjointed to investigate the Erratic Bloclcs of 

 the British Isles and to taJce measures for their preservation. (Brawn 

 up hij the Secretary.) 



The records which have been transmitted to the Committee during the 

 past year come from only two districts. The Boulder Committee of the 

 Yorkshire Naturalists' Union continues its most valuable work over 

 the entire county. Records which call for particular notice are the 

 boulder of diabase at Aldfield, near Ripon (the most westerly point to 

 which rocks foreign to the district have been traced), and the boulders 

 of limestone at Escrick, which resemble some of the rocks of Swaledale. 

 Carboniferous limestones rarely display characters by which their exact 

 place of origin can be determined. 



