NATURAL HISTORY AND PHYSIOGRAPHY OF NEW BRUNSWICK. 531 
Below Whitney Brook, I havq seen the river only at three or 
four points, but I infer, from accounts given me by lumbermen, 
that these represent the general character. In all of these places 
the valley is narrower than above ; the river is rapid and boulder- 
obstructed, and there is upon one side or the other, or both, an 
elevated (200-300 feet) flat bounder-p?ain, extending back to the 
valley walls which rise gradually to the plateau height. This 
stony plain, commonly characterized by a growth of black-spruce 
and heath, is continuous, I have no doubt, with that already 
described north of Whitney Brook, and is of the same kind as 
the plains on the North Pole (Note 99). They represent, I take 
it, the floors of these rivers during the melting of the glacial ice, 
the rivers being held up to those heights by the dams which 
created the post-glacial falls and gorges at their mouths. In 
post-glacial times the rivers have been able to cut down the rock 
barriers at their mouths, and to cut thus deeply into the boulder 
plains. Such is the character of the river, so far as I know it, 
down to the entrance of the Guagus. When it is carefully studied 
it will no doubt be found to have some such former connection 
with the Mullins Stream waters, as I have suggested in my 
note on the Northumbrian Rivers (Note No. 93). 
The Guagus occupies a somewhat mature-looking valley 
heading up on the central plateau and running parallel with the 
Branch, as shown by the map. In the vicinity of the upper lakes 
the country is burnt, affording extensive views, and there is a 
gap through to the Branch, with a two-outlet lake, as already 
described. One of the lakes, WamboCt Lake, is said to be a very 
clear spring-fed lake high up on the plateau, but the others are 
shallower. Guagus Lake is a typical New Brunswick woods 
lake, shallow, with boggy margin on the west (under shelter from 
the prevailing winds), and boulder margin on the east. It is the 
most moose-haunted lake I have seen in New Brunswick.* Look- 
ing up its length, one can see the Guagus valley extending off 
far to the northwest, and on the east of it is the great central 
plateau extending down between Guagus and Sevogle waters 
almost to the lake. The edge of this plateau then swings off to 
* The elevations above sea level of this and the other places on the map have 
all been determined by myself with aneroid, using the various precautions described 
in earlier notes. 
