202 Mr. W. Brockbank on 



latitudes on the ice-bound coasts of Labrador and New- 

 foundland, where floe ice prevails for many months of the 

 year over an area of from 200 to 300 miles wide, whilst the 

 land is covered with glaciers during the same period. The 

 glaciers bear the boulders down to the sea shore during the 

 summer, and these are picked up by the floe ice, during the 

 following winter and borne away at the breaking-up of the 

 ice as warm weather returns, and floated seawards as 

 the wind and waves may direct their course. To complete 

 the picture, we have only to suppose the Lake District 

 an isolated group of mountains, in a frozen sea, and 

 much of Lancashire and the Midland Counties submerged, 

 and under similar conditions to those now prevailing 

 in Labrador and Newfoundland ; and there is every reason 

 to believe that such were the conditions which obtained 

 during the period in which our Boulder Drift was deposited. 

 The Duddon Valley, in its upper portion, which centres 

 in Bowfell, is in its glacial aspect similar in every way to 

 Eskdale, from which, in fact, it is only separated at its 

 origin by a low water-parting, so that any glacier from 

 Bowfell would flow over into each of those valleys in 

 common. Below Seathwaite Tarn it would, however, 

 receive a very important affluent from the Coniston range, 

 " Coniston Old Man " being immediately above Seathwaite 

 Tarn. At this point of the valley of the Duddon we there- 

 fore find, as might be expected, very fine examples of 

 glacial action, and especially in the mammilated and scored 

 rocks and perched blocks, several of which form the 

 subjects of the interesting set of drawings exhibited, for 

 which I am indebted to my friend W. Hull. I have 

 not visited the Duddon recently, but was aware of the 

 existence of these examples of glacial action, and requested 

 my friend to send me a few sketches of them. He does 

 not profess to be a geologist, but his remarks upon the 

 Duddon Valley are of interest. He writes, in reply to my 



