HoiiHirth : TJie Ice-boriic Boulders of Yorkshire. 99 



Riding man who resided within touch or easy reach of the 

 promised land. 



Certain members of the Hull Geological Society have 

 exi'ited as well as they might, in the hinterland about Hull and 

 elsewhere, but they have really lived the joyous part of their 

 lives upon the coast, studying its complicated "geological and 

 :glacial phenomena, and revelling in the vast collection of 

 boulders to be found there. To the work of these, the Com- 

 mittee owes a debt of gratitude, and rich stores of information. 

 Probably every yard of the shore, accessible at low tide, 

 from the Spurn to the Tees, has been searched at one time or 

 other. 



The grapes brought back from this promised Land have 

 happily had the effect of encouraging those who lived further 

 inland to see what might after all be made of their own less 

 fertile soil, and no little credit is due to many who have searched 

 for scores of days and found nothing to put down in offnial 

 records, but who have, nevertheless, accumulated the negative 

 evidence which is essential to accurate conclusions. 



In endeavourino: to focus the results of the Boulder Com- 

 mittee's work, it will be advisable only to deal with such rocks 

 as are foreign to the county, and of types which are capable 

 of definate identification, and which enable their actual or 

 approximate original sources to be stated with tolerable 

 -certainty. 



While this method leaves out of count many hundreds 

 ■of records, such as ' Whinstone,' ' Basalt,' ' Trap,' ' Dolerite/ 

 •etc., etc. (which terms afford insufficient descriptions), and also 

 sorts out thousands of records of inter-county and local distribu- 

 tions of erratics, it has the advantage of bringing more clearly 

 into our review those rocks which, just because they can be 

 identified, best illustrate the facts of source, route, and distribu- 

 tion of erratic boulders which have reached Yorkshire, so far 

 as those facts are at present known. 



This report makes no claim to be complete, and still less 

 any pretence of being final. 



To begin with, then, it is clear that Yorkshire has been 

 invaded by foreign ice, i.e., ice foreign to the county ; ice 

 foreign to England (let us say) ; and ice foreign to Great 

 Britain altogether. 



{To be C07itiimed). 



1908 March i. 



