CORRESPONDENCE. 
THE GLACIATION OF IRELAND. 
S1r,—Professor Kendall’s criticisms of my paper on Irish Eskers 
include various specific objections. 
(1) He complains of lack of deliberation. The first of my many 
visits to Irish eskers was in 1887. At my time of life I cannot hope 
for equal further deliberation. 
(2) He objects that the paper contains very few new field 
observations. I should have been less surprised by the complaint 
that the paper quoted too lengthily from my field note-books ; 
seventeen pages out of thirty-five are occupied by detailed 
descriptions of representative eskers and mainly of their internal 
structures; and I justified this length on the ground that the 
previous literature “‘deals mainly with their distribution and 
general structure’ (p. 116), and but little with their intimate 
structure. 
(3) Apparently I should have quoted my notes at still greater 
length, for compression has led to misunderstanding. In accordance 
with Professor Kendall’s habit of regarding as simple mistakes views 
he does not accept, he so dismisses the attribution of the crescentic 
series of eskers around the northern end of the Slieve Bloom 
Mountains to ice from those hills. He says I “ might have been 
spared this mistake’ had I consulted G.S.I. Memoir, No. 117-8. 
I had not only consulted it but quoted it, for its account of some 
“ anastomosing eskers ’. Professor Kendall’s quotation from that 
Memoir supports my conclusion ; for the rarity of Galway granite 
on the northern in contrast to its abundance on the southern 
slopes of the Slieve Bloom Mountains, is most easily explained by 
its entrance having been hindered or by it having been subsequently 
swept away by local ice. The existence of this local drift is 
recognized in the Memoir, No. 127, p. 26. 
As regards the position of Roscrea, my sentence: “‘ The Roscrea, 
Clonaslee, Mountmellick, and Maryboro Eskers were probably 
formed by ice which flowed down the northern slopes of the Sheve 
Bloom Mountains ’’—was an attempt to indicate in two lines the 
relations of over 30 miles of esker. They are part of one crescentic 
series around the northern end of the range. Moreover, the term 
Sheve Bloom Mountains is sometimes used (e.g. Phillips, Atlas of 
Comparative Geography, and the map used in Carvill Lewis’ 
Glac. Geol. Gt. B. and I., 1894, opp. p. 83), to include the geological 
continuation of the range south-west of the Roscrea Gap, and in 
that sense the south-western or Roscrea end of the series is north of 
the range. 
I referred so briefly to this series because unusual detail had been 
given of its internal structure (e.g. Memoir, No. 126, p. 22). 
(4) The origin of the boulders is but exceptionally referred to 
in my paper because it is so seldom that the last direction of 
movement can be inferred from the nature of the included rocks. 
Thus, the granite in the kame near Barony Bridge, Tyrone, gives 
