NATURAL HISTORY AND PHYSIOGRAPHY OF NEW BRUNSWICK. 535 
Branch has yet a great bend to the eastward. This stage is 
represented in the accompanying Diagram i. I take it the great 
rocky bends on its eastern shore were formed by the windings 
of the river around ancient alluvial points extending from the 
western shore, precisely as all of our rivers in this region are 
cutting their concave rocky banks to-day. 
Third. The glacial period arrived, and one’ of its effects was 
tc choke with drift the Sevogle valley below the original Forks, 
and as web. the old valley at A A of the map, thus forcing the 
dammed rivers to find new channels, and the Forks to lie in a 
new position. The lowest outlet happened to lie in the position 
of the present Gorge BB, and around by the present dry valley C, 
while the narrow rock mass at the present club house valley (D), 
afforded the lowest outlet for the North Branch, thus locating 
the Forks there. Thus was established the condition shown in 
Diagram 2. 
Fourth. There ensued a change in the glaciaC continuity, 
whereby both the old valleys, A and C, became choked, leaving 
the South Branch, BB, unaffected, thereby forcing the North 
Branch and the combined streams to find new channels, which 
they did, of course, at the lowest points, which happened to lie 
where those parts of the two rivers are now running, viz., at E 
and F. Thus was established the present arrangement, repre- 
sented (for comparison) by Diagram 3. 
Fifth. After these conditions had remained uniform long 
enough for the new channels to be cut below the rock bottoms 
of the old channels (as they can readily be seen now to be), the 
dams of drift were washed from the old valleys, — wholly from 
the old eastern valley C, almost wholly from the western valley 
A, and in large part from the club-house valley D. I presume 
