HARKEK : PETROLOCxTCAL NOTES. 
307 
grapliic relation . The quartz is ofteu in rather mosaic-like aggi'egates, 
possibly connected with a certain amount of crushing in the rock- 
mass, and a little white mica, evidently secondary, may also he a 
result of mechanical disturbance. These two specimens are not 
unlike some of the Scotch granites, such as those of Mull and Criffel, 
but no specimens I have seen from Scotland present exactly the same 
characters as the boulders. The granite of Eskdale, in Cumberland, 
offers the closest resemblance to our slides, but this rock, though 
well-known in the Lancashire drift, is not one that we should expect 
to find in East Yorkshire. 
ON FURTHER EXPLORATION OF A TAVE AT ELBOLTON, NEAR THORPE, 
IN CRAVEN. BV REV. E. JONES. 
During the summer of 1888 some members of the Craven 
Naturalist Society had been exploring a small cave near the summit 
of Elbolton, particulars of which were given in a paper printed in the 
Proceedings of this Society last year. We made an experimental 
trench across the first chamber, and dug down to the depth of near 
ten feet. At this point the material taken out of the trench so 
encumbered the work that the trench was discontinued. A quantity 
of bones, both animal and human, were discovered, together with 
bone-pins and pieces of early British Pottery. 
This year a Committee was formed to raise funds and to explore 
the cave systematically. The latter could only be done by clearing 
the whole deposit of the first chamber, and hauling it to the surface. 
Xeedful consents were courteously given by the landlord, Mr. N. H. 
Kelsall, and by the Lord of the Manor, Sir Chas. Tempest : 
and apparatus for winding the material was kindly lent by Mr. J. Ray 
Eddy. Two careful miners were engaged, and the work com- 
menced on August 19th, and is still in progress, one or more of the 
committee superintending the work. We have also had the advice 
and assistance of Mr. James W. Davis and other experienced workers. 
The original surface level of the floor was marked on the walls, and 
divisions marked off three feet apart on the North and South walls, 
and numbered in feet from a datum line at the cave mouth. These 
