14 The American Geologist. January, 1904. 
fleeted glacial movement averaged 200 feet yearly, it would 
indicate a duration of at least a hundred years for the time of 
reversal from the preceding general glaciation. 
A most astonishing profusion of large and small boulders, 
mostly of angular forms and little worn, supplied from the 
same granite of Mt. Deception, strew and fill an extensive un- 
dulating and partly knolly deposit of till, beginning a third of 
a mile east of the Fabyan House and reaching easterly about 
three miles to a picturesque rock gorge and falls of the Am- 
monoosuc. These boulders, from 2 or 3 feet to 25 feet in diam- 
eter, were doubtless contained in the almost stagnant lower part 
of the ice-sheet, by which they were carried so short a dis- 
tance to the southeast from their parent ledges, while the high- 
er parts of the ice moved much faster, passing onward over the 
southern extension of the Washington or Presidential range. 
In closing this paper, mention should be made of an inter- 
view with Mr. Allen Thompson, a veteran land surveyor, who 
was the guide and companion of Agassiz during ten days of 
his excursions in the region around Bethlehem in the summer 
of 1870. Starting from the Agassiz House in Bethlehem (so 
named because he boarded there during a part of that visit to 
the mountains, the house being then newly built for summer 
tourists), I walked ver\^ early on the morning of June 28, 1901, 
to the summit of the road leading toward Franconia past the 
west base of Mt. Agassiz (formerly called Picket hill). On' 
the way I called at a house in the south edge of the village for 
a drink of water, and, inquiring about Agassiz, I was much 
surprised and pleased to find that my questions were addressed 
to this old surveyor and mountain guide. He told me that 
Agassiz, in his conversation and manners, "was the most inter- 
esting man he ever knew." Eighteen years later, Mr. Thomp- 
son, being then seventy-four years old, spent seventy-three 
nights of the summer and autumn of 1888 in camping-out dur- 
ing land and timber surveys among these mountains. 
