4G 
NOTES ON BOULDER MARKINGS ON MR. KENDALL's MAP OF THE 
GLACIER LAKES IN THE CLEVELAND HILLS. 
BY JAMES H. HOWARTH, F.G.S., HON. SECRETARY OF THE 
YORKSHIRE BOULDER COMMITTEE. 
Mr. Kendall has accorded me the privilege of marking upon 
his glacial map of the Cleveland area the results of the researches 
of the Yorkshire Boulder Committee. 
As Honorar}^ Secretary I have in my possession the records 
of the labours all over the county of the members of that Com- 
mittee and of many other persons who have furnished records 
and supplied returns. These represent a vast amount of patient 
work carried on continuously for the last 17 years. During 
that period many thousands of records have been made, but the 
facts they represent have only of very recent years begun to 
fall into line and to establish certain definite principles illustrating 
the causes of the distribution of glacial erratics in Yorkshire. 
The Yorkshire Boulder Committee has always been extremely 
chary of drawing definite conclusions, and has again and again 
resisted temptations to generalise, but has chosen rather to wait 
patiently and to go on accumulating facts from year to year. 
Out of the mass of information accumulated certain conclusions 
may now, however, very fairly be drawn ; conclusions which 
have for some years past been gradually forcing themselves- 
upon the minds of the Committee, and which each succeeding: 
year's work seems to further illustrate and support. 
Mr. Kendall has very kindly suggested that I should ac- 
company the marking of his map with some notes. This I 
IDropose to do entirely from the point of view of the Boulder 
Committee as formed from its records. 
Of course it must be understood that I cannot pledge the 
Committee or its individual members to the way in which I 
may express their general conclusions ; but I have an especial 
pleasure in adopting Mr. Kendall's suggestion because it will 
be seen at once that the Boulder Committee's work falls into 
