THE ClRQtJES 683 



exactly at right angles to the trend of the main glacier. They must thus 

 have been formed by the small glacier which filled the valley, and they 

 are on the lee side of the ridge, exactly where they could not have been 

 made by the main ice and where they are sheltered from the subsequent 

 action of the same. An arrow at '^&," on figure 1, plate 30, indicates the 

 average direction of the ice. 



The next cirque, "r,'^ is entered by the "south sugar road" at a j)oint a 

 mile due east of Sunderland street, and a south branch of this road can 

 be followed for half a mile farther into the heart of the corrie, which is 

 surrounded by steep walls 60 to 80 feet high. 



The main sugar road mentioned above conducts one also into the larg- 

 est of these amphitheaters, "<i," which is a mile and a half long and 

 nearly a mile wide in its upper two-thirds, but contracts considerably 

 toward the mouth, where it is confluent with the one last described, and 

 continues beneath the sands. It has very steep and high walls except 

 around its broad head, where the slope is more gradual. The four great 

 steps of the narrow tongue between the lobes of this compound valley are 

 very striking. 



The next two corries, "e" and "/," complete the row of those facing 

 westward. They are not so clearly marked as the others, and show quite 

 clearly that they have not been preserved so nearly intact, but have been 

 partly planed away by the later ice-sheet. The southern of the two, 

 which faces due west, and is entered by the "north sugar road," is per- 

 fectly preserved in its south and east walls. The latter is a steep berg- 

 schrund 500 feet high. The parting between this and the northern one 

 is clear, but not steep, and only the innermost portion of the northern 

 one is preserved. It differs from the others also in that the bottom is 

 crossed by the many vertical terrace scarps almost as high and well 

 marked as on the ridges. It is just here at the northwest shoulder of 

 the mountain, where the impact of the main ice from the northwest 

 ^vould be strongest, that the wearing away of the former corries is most 

 apparent. 



On the northeast of the mountain is a great depression which is 

 its most prominent feature, as seen from the nortli. It is at first a 

 single cirque, "^," bounded at its head by a great bergschrund a mile 

 long, which has eaten back westerly, and between it and the head of the 

 cirque on the west is left a narrow steep-walled ridge forming the crest 

 of the mountain, and only just wide enough for a carriage road. Lower 

 down, this northwest cirque divides into two, "/t" and ";," which end as 

 high hanging valleys. 



The southern half of the east wall of the mountain is notched high 



